Thomas K J, Dominic C J
Department of Zoology, Banaras Hindu University, Varanasi, India.
Physiol Behav. 1987;41(5):515-7. doi: 10.1016/0031-9384(87)90091-6.
Re-exposure to stud males beginning on day 4 post coitum induced pseudopregnancy in a large proportion of female mice whose pregnancies were terminated by a single injection of 0.5 mg of bromocriptine on day 1 post coitum. By contrast, exposure to alien or strange males was ineffective in inducing pseudopregnancy in pregnancy-blocked females. The results suggest that the newly inseminated female retains the memory of the stud male for some days after mating. Activation of the 'memory' by pheromones of the stud males exerts a luteotrophic effect in pregnancy-blocked females resulting in the incidence of pseudopregnancy. This may account for the inability of the stud male to block pregnancy in his coital partner and also for the inability of alien males to block implantation in newly inseminated females housed with stud males.
在交配后第1天单次注射0.5毫克溴隐亭终止妊娠的大部分雌性小鼠中，从交配后第4天开始重新接触种公鼠可诱导假孕。相比之下，接触陌生或外来雄鼠对妊娠受阻的雌性小鼠诱导假孕无效。结果表明，新受精的雌性在交配后数天内保留了对种公鼠的记忆。种公鼠的信息素激活“记忆”，对妊娠受阻的雌性产生黄体营养作用，从而导致假孕的发生。这可能解释了种公鼠无法阻止其交配伴侣怀孕，以及外来雄鼠无法阻止与种公鼠同笼饲养的新受精雌性着床的原因。
