幼龄黑白花奶牛雌性生殖器官的解剖形态及发育观察

 本文对黑白花奶牛初生1～3日龄小母犊73头,5～6月龄小母牛6头和2岁母牛2头的生殖器官(包括卵巢、输卵管、子宫和阴道等16项)的形态结构进行了观察和测量。初生犊和小母牛的卵巢重分别为2岁母牛的12.13～14.02%和69.51～77.61%;初生犊和小母牛的输卵管长度分别为2岁母牛的53.71～54.19%和67.14%;初生犊和小母牛的子宫角长度分别为2岁母牛的52.43～53.75%和85.00～85.68%;初生犊和小母牛的阴道长度分别为2岁母牛的41.55%和50.94%。作者发现:68%的初生犊卵巢表面可见有泡状结构,且右侧卵巢均较左侧卵巢为大;92.50%初生犊的子宫角内和97.5%的初生犊的阴道中含有液体。

Observation on the Anatomy and Development of Reproductive System of Young Cow in Black-White Breed

The female reproductive systems of 73 newborn calves were measured and compared with that of heifer 5—6 months old and 2 years old in black and white breed.The weights of ovaries in newborn and 5—6 months old were 12.13～14.02% and 69.51～77.61% of 2 years old respectively; the lengths of oviducts in newborn and 5—6 months old were 53.71～54.19% and 67.14% of 2 years old respectively; the length of the uterine horn in newborn and 5—6 months old were 52.43～53.75% and 85.00～85.68% of 2 years old respectively; the lengths of vaginas in newborn and 5—6 months old were 41.55% and 50.94% of 2 years old respectively; Follicle-like specks were found on 68% of the surface of newborn calf's ovary.The right ovary was heavier than the left one.Besides, fluids were also found in 92.5% of the uterine horns and 97.5% of the vaginas in the newborn.