Induction of parturition in mares.
Thirty-seven induced parturitions involving thirty-one mares were studied over a 2-year period using various doses of oestrogen and oxytocin. The time of appearance and degree of expression of the major clinical signs of parturition, and the time for completion of delivery and the passage of the placenta were significantly influenced by increasing doses of oxytocin. Oestrogen was useful in softening and relaxing the cervix when it was tight, but was not essential to induction when the cervix was already soft and dilating. Fertility was not adversely affected by induced parturition.
D000818:Animals; D002584:Cervix Uteri / Q000187:drug effects; D036861:Delivery, Obstetric / Q000662:veterinary; D004054:Diethylstilbestrol / Q000494:pharmacology; D005260:Female; D006736:Horses; D007751:Labor, Induced / Q000662:veterinary*; D010121:Oxytocin / Q000008:administration & dosage / Q000494:pharmacology; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000187:drug effects*; D013546:Sweating
D010121:Oxytocin; D004054:Diethylstilbestrol