Stillbirth

Stillbirth in livestock refers to the birth of a dead offspring at or near full term, representing a devastating reproductive outcome that affects all major farm animal species. The term generally applies to offspring that die during late gestation, during the birth process itself, or within the immediate postpartum period before nursing or other signs of independent life. This condition constitutes one of the most significant sources of reproductive loss in livestock production, resulting in complete loss of the genetic and economic investment in the pregnancy while also potentially affecting maternal health and future fertility. Understanding the multiple causes and implementing comprehensive prevention strategies is essential for minimizing stillbirth losses.

Stillbirth occurs across all livestock species, though the specific risk factors, causes, and implications vary by species and production system. In dairy cattle, stillbirth rates typically range from 5 to 10 percent of calvings, with rates in some herds exceeding 15 percent when risk factors align. Beef cattle generally experience lower stillbirth rates due to different genetics, management, and calving conditions, though losses remain significant. Sheep and goats experience stillbirth and perinatal lamb or kid losses ranging from 10 to 25 percent of births in some systems. Swine production confronts substantial perinatal mortality with significant numbers of piglets born dead or dying shortly after birth. The pervasive nature of this problem across species highlights the importance of comprehensive prevention approaches.

The economic impact of stillbirth extends beyond the direct loss of the offspring to include associated costs and consequences. Direct losses include the value of the lost animal, which represents months of investment in the dam's nutrition and care during pregnancy. Indirect losses may include veterinary costs for addressing dystocia or complications, labor costs for calving assistance, and potential health or fertility impacts on the dam following difficult deliveries. For valuable genetics, the loss of specific offspring represents irreplaceable genetic setback. In dairy systems, stillbirth is associated with reduced subsequent milk production in the dam, compounding economic losses. The welfare implications are significant, as difficult deliveries causing stillbirth often involve pain and distress for the dam.

While stillbirth cannot be completely prevented, evidence-based management strategies can substantially reduce incidence rates. Prevention requires understanding and addressing the multiple risk factors that contribute to perinatal mortality, including genetics, nutrition, management, infectious diseases, and calving management. Early recognition of high-risk pregnancies allows implementation of enhanced monitoring and intervention readiness. When stillbirth does occur, systematic investigation helps identify correctable factors to prevent recurrence. A comprehensive approach combining genetic selection, nutrition optimization, disease prevention, and calving management offers the best opportunity for reducing stillbirth losses across livestock species.

The primary causes of stillbirth in livestock can be categorized into those affecting fetal development during pregnancy and those causing death during the birth process itself. Infectious diseases represent a major category of prenatal causes, with numerous viral, bacterial, and protozoal organisms capable of crossing the placenta to directly damage the fetus or causing placental dysfunction that indirectly compromises fetal viability. Specific infectious causes vary by species and region but include bovine viral diarrhea, infectious bovine rhinotracheitis, leptospirosis, neosporosis, brucellosis, and listeriosis among many others. Nutritional deficiencies during pregnancy can impair fetal development to the point of death or produce offspring too weak to survive the birth process. Genetic abnormalities, including lethal genes and chromosomal defects, cause death at various stages of development including late gestation.

Dystocia, or difficult birth, represents the single most important cause of stillbirth that occurs during the delivery process itself. Prolonged labor causes fetal hypoxia and acidosis as the umbilical circulation becomes compromised, leading to death if delivery is not completed promptly. Fetal-pelvic disproportion, where the offspring is too large to pass easily through the birth canal, is the most common cause of dystocia in cattle and often results from breeding decisions using large-framed sires on small dams. Abnormal fetal presentation, position, or posture can obstruct normal delivery progression. Uterine inertia, where the uterus fails to contract effectively, prolongs labor and compromises fetal viability. Multiple births, particularly in species normally producing singles, increase dystocia risk and associated stillbirth.

Environmental and management factors significantly influence stillbirth rates at both individual and herd levels. Heat stress during pregnancy affects fetal development and can trigger premature parturition or stillbirth. Cold stress at the time of calving increases hypothermia risk in newborns and may contribute to immediate postnatal death classified as stillbirth. Transportation stress during late pregnancy can trigger premature labor and fetal compromise. Housing conditions affecting the dam's comfort and the cleanliness of the calving environment influence outcomes. Management factors including nutrition during pregnancy, body condition at calving, and the quality of calving supervision all affect stillbirth risk. The timing and quality of intervention during difficult calvings dramatically affects whether the offspring survives.

Risk factors for stillbirth include characteristics of the dam, the sire, and the pregnancy itself. First-calf heifers have substantially higher stillbirth rates than mature cows, primarily due to their smaller pelvic dimensions increasing dystocia risk. Older dams past their reproductive prime may also face elevated risk. Sire genetics strongly influence calf birth weight and consequently dystocia and stillbirth risk. Male calves have higher stillbirth rates than females, attributed to larger birth weights. Twin pregnancies carry elevated stillbirth risk for one or both offspring. Short or prolonged gestation lengths relative to breed norms increase risk. Dam health problems during pregnancy, including metabolic disorders and lameness affecting mobility, contribute to adverse outcomes.

The pathophysiology of stillbirth varies by cause but often involves either developmental failure during gestation or acute compromise during delivery. Infectious agents may directly damage fetal organs, cause placental inflammation and dysfunction, or trigger premature parturition before fetal maturity. Genetic defects produce developmental abnormalities incompatible with life. Nutritional deficiencies impair development of critical organs or energy reserves needed for birth transition. During delivery, prolonged or obstructed labor causes progressive fetal hypoxia as placental gas exchange becomes impaired before respiratory function is established. Umbilical cord compression, premature placental separation, and meconium aspiration represent specific mechanisms of death during parturition. Understanding these mechanisms guides both prevention and intervention strategies.

Early warning signs that a pregnancy may be at risk for stillbirth can sometimes be detected through careful monitoring, though many stillbirths occur without preceding observable abnormalities. Decreased fetal movement in late gestation may indicate fetal compromise, though this sign is difficult to detect reliably in livestock without specialized monitoring. Premature udder development or milk letdown before expected parturition date may signal impending premature delivery. Abnormal vulvar discharge during pregnancy, particularly foul-smelling or colored discharge, suggests infection that may threaten fetal viability. Changes in the dam's behavior including anorexia, depression, or abdominal discomfort may indicate pregnancy complications. Regular monitoring of at-risk pregnancies through veterinary examination can sometimes identify problems before they progress to stillbirth.

In cattle and other large livestock, signs during labor that suggest stillbirth risk include prolonged labor without progress, which may indicate dystocia compromising the calf. Visible malpresentation such as a single foot, head only, or tail and hindquarters presented first requires intervention. Swelling of visible fetal parts suggests prolonged exposure and possible death. Malodorous discharge during labor indicates fetal death with decomposition already occurring. Meconium staining of fetal fluids suggests fetal distress. Weak or absent fetal reflexes when parts are accessible during examination indicate compromised viability. Maternal exhaustion from prolonged unproductive labor worsens prognosis for the offspring. Recognition of these signs should prompt immediate appropriate intervention.

Behavioral signs in the dam that may accompany stillbirth include altered labor patterns such as premature straining, prolonged inactive phases, or cessation of labor effort despite incomplete delivery. Some dams show exaggerated discomfort and frequent position changes when dealing with malpresented or oversized offspring. Following stillbirth, dams may display reduced maternal behavior compared to normal deliveries, with less licking, vocalizing, or attention to the dead offspring. Some dams become anxious or distressed, while others appear relatively indifferent. Appetite and general behavior may be affected depending on whether delivery complications caused maternal trauma or systemic illness. These behavioral patterns vary considerably among individual animals.

Physical examination findings consistent with stillbirth include absence of respiratory effort, heartbeat, and reflexes in the delivered offspring. The physical appearance provides information about timing of death: recently dead offspring appear similar to live animals while those dead for longer periods show discoloration, skin slippage, or more advanced decomposition. Meconium staining of the coat suggests fetal distress during labor. Examination of the offspring should note any visible deformities, size relative to expected for the breed and dam age, and any evidence of birth trauma from dystocia or intervention. The dam should be examined for birth injuries, retained placenta, and signs of infection or hemorrhage that might indicate complications during delivery.

The timeline of stillbirth-associated signs varies based on whether fetal death occurs during pregnancy versus during delivery. Infectious causes often produce fetal death days to weeks before delivery, with the dam potentially showing signs of illness initially before premature delivery of dead or mummified offspring. Acute causes during labor show compressed timelines with rapid deterioration in fetal viability as hypoxia develops. Dystocia-related stillbirths typically occur within hours of labor onset as progressive compromise leads to fetal death. Some stillbirths occur with minimal preceding signs, with apparently normal pregnancies and labor producing dead offspring. This variability in presentation makes prediction difficult and emphasizes the importance of monitoring and intervention readiness.

Emergency situations requiring immediate intervention during parturition include any labor showing inadequate progress, visible abnormal presentation, evidence of fetal distress, or maternal complications. Active labor without delivery progress for more than 30 minutes to 2 hours depending on species and stage warrants assessment. Visible malpresentation always requires evaluation and correction. Profuse hemorrhage or prolapsed tissues constitute emergencies regardless of fetal status. Maternal signs of systemic illness including fever, rapid heart rate, or profound depression during labor indicate complications requiring veterinary attention. Prompt recognition and appropriate response to these emergency signs can sometimes salvage live offspring from situations that would otherwise result in stillbirth.

Clinical examination following stillbirth should evaluate both the dead offspring and the dam to gather information about the cause and implications for future management. The offspring should be examined for size, conformation, any visible abnormalities or deformities, evidence of birth trauma, and stage of autolysis indicating time of death. The dam should be assessed for birth injuries, uterine condition, retained placenta, and overall health status. Complete reproductive tract evaluation determines whether complications such as uterine tears, cervical damage, or severe bruising occurred. Assessment of the placenta if available provides information about potential infectious causes through visual examination of cotyledons and membranes. Documentation through photographs and detailed notes supports subsequent diagnostic efforts and record analysis.

Diagnostic testing following stillbirth helps identify specific causes that may have implications for herd management and future prevention. Necropsy of the stillborn offspring by a veterinary pathologist provides the most comprehensive information, including identification of infectious agents, congenital defects, and evidence of hypoxia or trauma. Tissue samples should be collected for bacterial culture, viral isolation, and histopathology before significant autolysis occurs. Placental examination and sampling can identify placentitis from infectious causes. Blood samples from the dam may be tested for antibodies to specific infectious agents. Testing for genetic defects may be indicated if congenital abnormalities are observed or if the sire or dam has known carrier status for lethal genetic conditions.

Differential diagnosis for stillbirth encompasses the broad range of potential causes and distinguishes stillbirth from early neonatal death. True stillbirth where death occurred before or during delivery differs from perinatal mortality where offspring were born alive but died shortly after, though the distinction is not always clear and management implications overlap. Infectious causes must be differentiated from non-infectious causes including dystocia, genetic defects, and nutritional factors. Specific infectious agents should be identified when possible to guide prevention. Sporadic individual stillbirths have different implications than clusters suggesting common causes such as infectious disease outbreak or widespread nutritional deficiency. The pattern of occurrence helps direct diagnostic priorities and management responses.

Herd-level diagnostic evaluation becomes essential when stillbirth rates exceed expected levels or when patterns suggest common causes affecting multiple animals. Analysis of breeding, calving, and stillbirth records identifies patterns related to specific sires, dam age groups, time periods, or other factors. Monitoring of stillbirth rates over time tracks whether the problem is increasing, decreasing, or stable. Necropsy of multiple affected offspring identifies common pathological findings. Herd-level testing for infectious diseases associated with reproductive loss should be guided by regional disease prevalence and clinical findings. Nutritional evaluation including forage testing and assessment of supplement programs identifies potential deficiencies. Evaluation of genetics, particularly sire calving ease data, helps determine whether genetic factors contribute to elevated rates.

Emergency intervention during calving when stillbirth risk is identified focuses on expediting delivery to salvage live offspring when possible. When dystocia is recognized early, assisted delivery through traction, repositioning, or veterinary intervention may save calves that would otherwise die from hypoxia during prolonged labor. The decision tree for intervention depends on the specific problem identified, time since labor onset, fetal viability assessment, and available expertise. Excessive force during extraction risks both fetal and maternal injury, so appropriate techniques and lubrication are essential. When vaginal delivery is not possible or safe, cesarean section may salvage the calf if performed before fetal demise, though this decision requires veterinary expertise and consideration of maternal risks. Unfortunately, by the time stillbirth risk is recognized, fetal death may have already occurred.

Medical management following stillbirth centers on caring for the dam and preventing complications. Examination of the reproductive tract identifies injuries requiring treatment. Retained placenta is common following stillbirth and should be managed according to current evidence-based protocols. Antibiotic therapy may be indicated if uterine contamination or infection is suspected, particularly following prolonged or assisted delivery. Anti-inflammatory medications address pain and inflammation from birth trauma. Oxytocin or other ecbolics may be used to stimulate uterine involution and clearance. Calcium supplementation addresses hypocalcemia risk, particularly in dairy cattle. Supportive care ensures adequate nutrition and hydration during recovery. The goal is optimal recovery to restore the dam's health and future reproductive potential.

Surgical intervention following stillbirth may be required when complications arise. Fetotomy, or surgical dismemberment of a dead fetus, allows vaginal delivery when intact delivery is not possible due to size or position. This procedure requires skill to avoid maternal trauma and should be performed by experienced practitioners. Cesarean section may be needed for dead fetus removal when fetotomy is not feasible or carries excessive risk. Surgical repair of vaginal or cervical lacerations may be required following traumatic delivery. Uterine prolapse occurring after stillbirth requires prompt surgical replacement. These procedures carry maternal risks that must be weighed against alternatives, and recovery management is critical for good outcomes.

Supportive care for dams following stillbirth addresses physical recovery and manages any complications. Rest in clean, comfortable housing supports healing. Nutritious feed and fresh water maintain condition during recovery. In dairy cattle, decisions about milking following stillbirth depend on milk production level and any treatments administered. Monitoring for complications including retained placenta, metritis, and systemic illness continues for several weeks post-calving. Body condition assessment and nutritional adjustment ensures adequate reserves for recovery and future breeding. The emotional aspect of stillbirth loss varies among individual animals, with some showing apparent distress that may benefit from supportive management.

Herd-level treatment approaches address systemic factors contributing to elevated stillbirth rates. If infectious disease is identified as a cause, herd-level vaccination or treatment protocols may be indicated. Nutritional interventions address identified deficiencies at the population level through feed or water supplementation. Genetic management through sire selection for calving ease reduces dystocia-related stillbirths over time. Calving management protocols ensure adequate monitoring and appropriate intervention timing for all at-risk calvings. Staff training improves recognition of problems and quality of intervention. These herd-level approaches address root causes rather than treating individual occurrences.

Decisions following stillbirth must consider the dam's future reproductive potential and the implications of identified causes. Most dams recover from uncomplicated stillbirths and conceive successfully in subsequent breedings. Those with significant birth injuries or infections may have impaired fertility or require extended recovery before rebreeding. Dams with hereditary conditions that caused the stillbirth should be evaluated for continued breeding. Economic analysis should consider the dam's production value, age, and reproductive history in retention decisions. Stillbirth occurrence should be documented in records to inform future breeding decisions and contribute to herd-level analysis of risk factors.

Recovery timeline for dams following stillbirth depends on whether complications occurred and the general health status of the animal. Uncomplicated stillbirths where delivery occurred without significant difficulty allow relatively rapid physical recovery, with uterine involution progressing normally over 4 to 6 weeks. Complicated deliveries involving dystocia, assisted extraction, or cesarean section require longer recovery periods, potentially 8 to 12 weeks before optimal reproductive tract health is restored. Infections or injuries following stillbirth extend recovery timelines and may permanently affect future fertility. Individual variation in healing means recovery should be assessed through veterinary examination rather than assumed based on time elapsed.

Post-stillbirth care and monitoring ensures complications are identified promptly and recovery progresses appropriately. Daily observation during the first week monitors for retained placenta, abnormal discharge, fever, depression, or reduced appetite that might indicate developing problems. Temperature monitoring helps detect infections early. Reproductive tract examination at approximately 4 to 6 weeks postpartum assesses involution and identifies any residual abnormalities requiring treatment before rebreeding. Body condition monitoring ensures adequate nutritional support for recovery. Production monitoring in dairy animals tracks return to normal milk yield. Documentation of recovery progress informs decisions about rebreeding timing.

Prognosis for future reproductive performance following stillbirth is generally favorable when the stillbirth was uncomplicated and recovery proceeds normally. Most animals return to normal fertility and conceive successfully in subsequent breedings. However, prognosis varies based on the cause of stillbirth, whether complications developed, and individual animal factors. Dams that experienced severe dystocia with birth canal injuries may have reduced fertility or increased risk of repeat problems. Those with infections may require extended recovery before fertility is restored. Genetic causes of stillbirth may recur if the same sire is used. Age and parity affect both immediate recovery and long-term reproductive potential. Realistic expectations should guide breeding decisions.

Return to production considerations following stillbirth include timing of rebreeding and selection of service sire for subsequent pregnancy. Voluntary waiting periods should allow complete recovery before breeding, with typical recommendations of 50 to 70 days postpartum for dairy cattle though this may be extended following complications. Prebreeding examination confirms uterine health and ovarian activity. Sire selection for subsequent breeding should consider calving ease data, particularly if dystocia contributed to the stillbirth. For dams with repeated stillbirths, evaluation for underlying causes should precede further breeding attempts. Production expectations should account for any lasting effects of the stillbirth event on the dam's condition or health.

Vaccination protocols protect against infectious diseases that cause fetal death and stillbirth. Core reproductive vaccines should be administered before breeding to ensure protection throughout pregnancy, with specific products chosen based on regional disease prevalence and herd risk factors. Vaccines against bovine viral diarrhea, infectious bovine rhinotracheitis, leptospirosis, and campylobacteriosis are commonly included in cattle programs. Clostridial vaccines protect against both maternal and neonatal disease. In sheep, vaccines against enzootic abortion, toxoplasmosis, and clostridial diseases reduce reproductive losses. Vaccine timing and boosters should follow product recommendations and veterinary guidance. Annual review of vaccination programs ensures appropriate protection against current disease threats.

Biosecurity measures prevent introduction and spread of infectious agents associated with stillbirth. Closed herd policies or testing and quarantine of introduced animals reduce disease introduction risk. Isolation of animals that have aborted or delivered stillborn offspring prevents transmission to pregnant herdmates. Proper disposal of stillborn animals, aborted fetuses, and birth fluids minimizes environmental contamination. Rodent and wildlife control reduces reservoir hosts for some reproductive pathogens. Protection of feed and water from contamination prevents exposure to pathogens including those causing listeriosis and toxoplasmosis. Visitors, vehicles, and equipment should be managed to minimize disease introduction from outside sources.

Nutritional prevention ensures adequate nutrition throughout pregnancy to support fetal development and dam health. Energy and protein requirements increase during pregnancy, particularly in late gestation when fetal growth accelerates. Body condition management prevents both over and under conditioning at calving. Mineral and vitamin supplementation addresses regional deficiencies that might affect fetal development or survival. Selenium, vitamin E, copper, and zinc all play roles in reproductive health and immunity. Forage testing and ration balancing ensures adequate nutrient supply. Transition period nutrition in dairy cattle supports metabolic health at calving. Adequate water intake supports overall health and milk production.

Management practices significantly influence stillbirth risk and offer important prevention opportunities. Genetic management through selection of calving ease sires, particularly for heifers, reduces dystocia-related stillbirths. Heifer development programs ensure adequate size and maturity at first breeding. Calving management systems appropriate for the operation type provide monitoring and intervention capability when needed. Heat stress management during pregnancy reduces adverse effects on fetal development. Maintaining appropriate body condition throughout pregnancy supports optimal calving outcomes. Staff training ensures recognition of calving problems and appropriate response. These practices address major risk factors for stillbirth.

Monitoring and early intervention protocols enable identification and management of high-risk situations before stillbirth occurs. Pregnancy diagnosis confirms viable pregnancies and identifies twins or other high-risk situations requiring enhanced monitoring. Late-pregnancy monitoring identifies impending problems such as premature udder development or abnormal behavior. Calving monitoring ensures prompt recognition of labor onset and appropriate supervision through delivery. Intervention protocols define when and how to assist calving, preventing both under-intervention that leads to dystocia death and over-intervention that causes trauma. Record analysis identifies risk patterns enabling targeted prevention. Veterinary consultation helps develop and refine protocols appropriate for specific operations.

Daily management during late pregnancy and the calving period is critical for stillbirth prevention and early intervention when problems develop. Pregnant animals should be observed regularly for signs of impending parturition and any health problems that might affect delivery outcome. As calving approaches, animals should be moved to clean, appropriate calving areas where close monitoring is possible. Calving schedules should anticipate delivery dates and ensure adequate staffing for monitoring and intervention. Feed and water access should be maintained to support the dam's health and upcoming calving effort. Environmental conditions including temperature and footing should be optimized. Records should track breeding dates to enable accurate prediction of calving dates.

Housing and environmental management for late-gestation and calving animals significantly affects stillbirth risk. Calving areas should provide clean, dry, well-bedded surfaces that are easy to clean between animals. Adequate space allows normal calving behavior and easy access for monitoring and intervention. Protection from extreme weather reduces stress on both dam and newborn. Non-slip surfaces prevent injuries during calving and the immediate postpartum period. Separation of calving animals from the main herd reduces disease exposure and allows individual attention. Draft-free but well-ventilated housing maintains air quality without excessive heat loss. These environmental factors contribute to successful calving outcomes.

Herd health programs should address stillbirth prevention as part of comprehensive reproductive management. Written protocols should define monitoring schedules, intervention criteria, and response procedures for calving difficulties. Vaccination programs should target infectious causes of stillbirth relevant to the region and operation. Genetic management should prioritize calving ease, particularly for heifer breeding. Nutritional programs should meet the needs of pregnant animals throughout gestation. Staff training ensures consistent implementation of protocols and appropriate response to problems. Regular veterinary involvement provides expert guidance and periodic evaluation of outcomes. Benchmarking against industry standards identifies areas for improvement.

Record keeping enables analysis of stillbirth patterns and evaluation of prevention efforts. Individual animal records should document breeding dates, pregnancy status, calving date and difficulty, offspring status, and any complications. Stillbirth records should capture details including probable cause, dam identification, sire, parity, and any intervention attempted. Analysis of records identifies patterns related to sires, dam age groups, time periods, or other factors that might indicate specific causes. Tracking stillbirth rates over time monitors whether prevention efforts are effective. Records support genetic decisions by identifying bloodlines with elevated stillbirth rates. Comprehensive records enable evidence-based management improvements.

Economic considerations in stillbirth management involve balancing prevention investments against expected reductions in loss. Prevention measures including vaccination, improved nutrition, genetic selection, and calving management all carry costs that must be justified by anticipated benefits. The economic value of prevented stillbirths includes the value of surviving offspring, avoided costs of complicated calvings, and improved maternal productivity. For operations with elevated stillbirth rates, targeted interventions addressing specific causes often provide favorable returns. Cost-benefit analysis guides prioritization of prevention investments. Individual animal decisions following stillbirth consider the dam's value and future reproductive potential against recovery costs and culling alternatives.

High-risk breeds and categories for stillbirth include those characterized by large birth weights, muscular conformation, or challenging calving characteristics. In cattle, Belgian Blue and other double-muscled breeds have extremely high dystocia and stillbirth rates, often requiring cesarean delivery. Charolais and other large-framed continental breeds produce calves with elevated birth weights and increased stillbirth rates, particularly when crossed on smaller dams. Holstein dairy cattle have higher stillbirth rates than many beef breeds, influenced by both genetics and intensive management. Among beef breeds, variation in calving ease is substantial, with some bloodlines within breeds showing much higher stillbirth rates than others. First-calf heifers across all breeds have significantly higher stillbirth rates than mature cows.

Production type and management intensity influence stillbirth risk across livestock species. Intensively managed dairy cattle face higher stillbirth rates than extensively managed beef cattle, reflecting differences in genetics, nutrition, body condition, and calving supervision. Within species, selection for extreme production traits may have inadvertently increased stillbirth risk through effects on calf size, metabolic stress, or other factors. Confinement housing versus pasture calving affects both monitoring capability and environmental conditions at birth. High-value genetics may receive more intensive monitoring and intervention that reduces stillbirth, while lower-value animals in extensive systems may receive less attention. The interaction of genetics and management must be considered in assessing and addressing stillbirth risk.

Genetic selection provides powerful tools for reducing stillbirth risk over time. Calving ease expected progeny differences and similar genetic evaluations allow selection of sires that produce offspring with lower dystocia and stillbirth rates. Using these evaluations is particularly important for breeding heifers, where the risk difference between high and low calving ease sires is substantial. Within-herd selection against dams with stillbirth history concentrates favorable genetics. Avoiding known carrier status for lethal genetic conditions prevents genetic stillbirths. Selection for moderate rather than extreme birth weight can reduce dystocia risk. Crossbreeding programs can incorporate breeds with superior calving characteristics. Genetic management represents one of the most effective long-term approaches to reducing stillbirth rates.

Commonly co-occurring conditions with stillbirth include dystocia, which is both a cause of and commonly associated with stillbirth when difficult delivery results in fetal death. Retained placenta occurs more frequently following stillbirth than normal delivery, likely due to abnormal placental maturation and separation. Metritis may develop following stillbirth, particularly with retained placenta or uterine contamination during assisted delivery. Metabolic disorders including hypocalcemia and ketosis share risk factors with stillbirth and may occur around the time of calving. Birth injuries to the dam including vaginal lacerations and uterine damage occur more frequently with stillbirths than normal deliveries. Recognition and management of these associated conditions is important for optimal maternal recovery.

Conditions with similar outcomes to stillbirth require differentiation for accurate diagnosis and appropriate management response. Abortion refers to pregnancy loss before term, while stillbirth occurs at or near term, though the distinction is sometimes arbitrary. Perinatal mortality encompasses both stillbirth and early neonatal death, with similar causes and prevention approaches. Weak calf syndrome where offspring are born alive but fail to thrive may represent a milder form of the same conditions causing stillbirth. Congenital defects may cause death at various stages from early embryonic loss through stillbirth to neonatal mortality. Understanding the spectrum of pregnancy loss helps identify underlying causes that might be addressed to improve outcomes.

Complications and sequelae of stillbirth extend beyond the immediate loss to affect maternal health and future productivity. Retained placenta is a common immediate complication requiring management. Metritis and endometritis may develop, potentially affecting future fertility. Birth injuries from dystocia or intervention may cause permanent damage to the reproductive tract. Future fertility may be reduced, particularly following complicated stillbirths with significant maternal trauma. Risk of repeat stillbirth in subsequent pregnancies is elevated, particularly if the underlying cause persists or if genetic factors contributed. Comprehensive management following stillbirth aims to minimize these complications and protect future reproductive potential.