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Successful induction of lactation, foal grafting and maintenance of pregnancy in a nonparturient Thoroughbred mare

机译:在非产妇纯种母马中成功诱导泌乳、移植小马驹和维持妊娠

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摘要

Abstract An 8‐year‐old mare was presented for induction of lactation and adoption of a 30‐day‐old twin filly. In each of the two seasons prior to presentation, the mare had delivered a foal that died shortly after birth. The mare had been bred by live cover ˜25 days prior to presentation to the Illinois Veterinary Teaching Hospital, but no pregnancy diagnosis was yet performed. Upon arrival at the hospital, pregnancy diagnosis confirmed a viable singleton gestational vesicle. Lactation was induced with dopamine D2 agonists. Immediately before grafting, the mare was started on altrenogest to provide exogenous hormonal support for the pregnancy. After two consecutive days of PGF2α administration on Day 30 of gestation, the mare began to accept the foal, but by the next day, the mare had insufficient milk production and began to show signs of foal rejection. The mare was treated with acepromazine for sedation and stimulation of lactation, with concurrent analgesic support provided by flunixin meglumine and butorphanol. One ovulation was confirmed on Day 40, and a second ovulation was confirmed on Day 45 of gestation. On Day 47 of gestation, 11 days after adoption, serum progesterone concentration was 13.2 ng/mL. As this value was above the minimum level (≥4 ng/mL) deemed necessary to maintain pregnancy in the mare, altrenogest administration was tapered and ultimately discontinued on Day 50 of gestation. The pair remained at the hospital for treatment of leucopenia in the filly. On Day 61 of gestation, 25 days after adoption, continued maintenance of pregnancy was confirmed in the mare, full lactation had been achieved, and strong bonding between mare and foal was apparent. The pair was discharged from the hospital to the care of the owner.
机译:摘要 以一匹8岁母马为研究对象,对一匹30日龄的双胞胎母马进行催产和收养。在展示前的两个季节中,母马生下了一匹小马驹,但小马驹在出生后不久就死了。这匹母马在被送往伊利诺伊州兽医教学医院前 25 天通过活体饲养,但尚未进行妊娠诊断。到达医院后,妊娠诊断证实了可行的单胎妊娠囊泡。用多巴胺 D2 激动剂诱导泌乳。在移植之前,母马开始服用烯丙孕素,为怀孕提供外源性激素支持。在妊娠第 30 天连续两天服用 PGF2α 后,母马开始接受小马驹,但到第二天,母马产奶量不足,开始出现小马驹排斥的迹象。母马用乙酰丙嗪镇静和刺激泌乳,同时由氟尼辛葡甲胺和布托啡诺提供镇痛支持。在第 40 天确认了一次排卵,在妊娠第 45 天确认了第二次排卵。在妊娠第 47 天,即收养后 11 天,血清黄体酮浓度为 13.2 ng/mL。由于该值高于维持母马妊娠所需的最低水平(≥4 ng/mL),因此逐渐减少烯丙孕素给药,并最终在妊娠第 50 天停止。两人留在医院治疗白细胞减少症。在妊娠第61天,即收养后25天,母马确认继续怀孕,已完全泌乳,母马和小马驹之间的牢固联系很明显。这对夫妇已出院,由主人照顾。

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