Lagerkvist G, Einarsson E J, Forsberg M, Gustafsson H
Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala.
J Reprod Fertil. 1992 Jan;94(1):11-21. doi: 10.1530/jrf.0.0940011.
Plasma concentrations of oestradiol-17 beta and progesterone were studied in yearling mink females. The blood samples were collected from 2 March until 13 April in females not subjected to mating and in females mated on two consecutive days, early or late in the breeding season, or with 8-9 days between matings. Peaks in oestradiol-17 beta were recorded on the day of first mating, in relation to the second wave of growing follicles, and in early April, around the time when implantation should have occurred. Significant rises in progesterone were recorded from 17 to 21 March and were slightly later in females mated late in the season. Histological studies of ovaries from unmated females revealed that the number of 'active' follicles exceeded the number of degenerated or luteinized follicles until 7 April, after which the number of degenerated follicles increased rapidly. Degeneration was followed by luteinization. On 15 April, ovaries were collected from two females having 15 luteinized follicles each. These females had increased plasma concentrations of progesterone. These studies indicate that, in female mink, peaks in oestradiol-17 beta coincide with the first mating as a result of the copulatory act and that unmated females appear to experience a luteal phase in the absence of ovulation.
对一岁龄雌性水貂的雌二醇 - 17β和孕酮的血浆浓度进行了研究。在未交配的雌性以及在繁殖季节早期或晚期连续两天交配的雌性，或交配间隔8 - 9天的雌性中，于3月2日至4月13日采集血样。雌二醇 - 17β的峰值记录在首次交配日，与第二波生长卵泡相关，以及在4月初，即着床本应发生的时间左右。孕酮在3月17日至21日有显著升高，且在繁殖季节后期交配的雌性中稍晚出现。对未交配雌性卵巢的组织学研究表明，直到4月7日，“活跃”卵泡的数量超过退化或黄体化卵泡的数量，之后退化卵泡的数量迅速增加。退化之后是黄体化。4月15日，从两只各有15个黄体化卵泡的雌性中采集卵巢。这些雌性的血浆孕酮浓度升高。这些研究表明，在雌性水貂中，雌二醇 - 17β的峰值因交配行为而与首次交配同时出现，并且未交配的雌性在未排卵的情况下似乎经历了黄体期。
