Gudermuth D F, Newton L, Daels P, Concannon P
Department of Psychology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
J Reprod Fertil Suppl. 1997;51:177-84.
Cats are considered to be reflex ovulators that exhibit a luteal phase (pregnancy or pseudopregnancy) only after copulatory stimulation. In a group-housed colony of 15 1-year-old domestic queens, 23 noncopulatory, spontaneous ovulations were observed in 87% of the queens over 4.5 months based upon the detection of increased concentrations of progesterone in faeces, serum, or both. Luteal phases were detectable for periods of 3 to 5 weeks with peak progesterone concentrations averaging 21 +/- 1 ng ml-1 in serum and 1874 +/- 281 ng g-1 in faeces. Individual cats exhibited from 0 to 3 spontaneous ovulations and subsequent pseudopregnancies each. A male was added to a separate cage within the room during the last 1.5 months of the study. The incidence of ovulation per 10 day period ranged from 0% to 22% before introduction of the male and from 33% to 57% immediately after introduction of the male, suggesting a potential noncopulatory influence of the male on the incidence of spontaneous ovulation in young, group-housed cats.
猫被认为是反射性排卵动物，只有在交配刺激后才会进入黄体期（怀孕或假孕）。在一个饲养了15只1岁家养母猫的群体中，基于粪便、血清或两者中孕酮浓度升高的检测，在4.5个月内，87%的母猫出现了23次非交配性自发排卵。黄体期可检测到3至5周，血清中孕酮浓度峰值平均为21±1 ng/ml，粪便中为1874±281 ng/g。每只猫自发排卵次数为0至3次，随后均出现假孕。在研究的最后1.5个月，将一只雄性猫放入房间内的一个单独笼子里。引入雄性猫之前，每10天的排卵发生率在0%至22%之间，引入雄性猫后立即升至33%至57%，这表明雄性猫可能对群居的年轻母猫自发排卵发生率有非交配性影响。
