hydrallantois

hydrallantois

a gross accumulation of fluid in the allantoic sac. Occurs in cows, rarely in mares. Causes dystocia, uterine inertia and death or abortion of the fetus.
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Conceptuses and neonates derived from nuclear transfer frequently develop pathologic conditions including large offspring syndrome, prolonged gestation, dystocia, fetal and placental edema, hydrallantois and hydramnios, abnormal size of organs, respiratory problems and perinatal death (Young et al.