Beal W E, Milvae R A, Hansel W
J Reprod Fertil. 1980 Jul;59(2):393-6. doi: 10.1530/jrf.0.0590393.
Twice daily i.m. injections of PGF-2 alpha on Days 3 and 4 of the bovine oestrous cycle inhibited progesterone secretion by the corpus luteum and induced precocious oestrus. Injections given less frequently or earlier in the cycle did not induce precocious oestrus but twice daily injection on Days 2 and 3 or Day 4 appeared to inhibit progesterone secretion without affecting oestrous cycle length.
在牛发情周期的第3天和第4天，每天两次肌肉注射前列腺素F-2α可抑制黄体分泌孕酮并诱导早熟发情。在周期中注射频率较低或时间较早时不会诱导早熟发情，但在第2天和第3天或第4天每天两次注射似乎可抑制孕酮分泌而不影响发情周期长度。
