Barfield R J, Krieger M S
Physiol Behav. 1977 Aug;19(2):203-8. doi: 10.1016/0031-9384(77)90328-6.
Ejaculatory patterns were observed in normally reared, postpuberally castrated male and female rats treated with sex hormones and electrical shock in adulthood. In a preliminary experiment, 3 females treated with 50 microgram estradiol benzoate (EB) and 500 microgram progesterone (P) showed intromission and ejaculatory behavior when subjected to shock. Refractory periods were abnormally short and there was almost no postejaculatory vocalization. In Experiment 1, males and females were tested with electrical shock following daily treatment with 32 microgram EB with and without 500 microgram P on the test day. There was no difference between males and females in preejaculatory behavior, but females displayed abbreviated refractory periods and no postejaculatory vocalization. Progesterone had no observed effect. In Experiment 2 castrated males and females were subjected to shock after treatment with 8 microgram EB per day for 3 weeks. No P was given. Again females showed drastically reduced refractory periods and little vocalization. In Experiment 3, males and females treated with TP and shock displayed ejaculatory patterns, normal refractory periods and vocalization. Results show that female rats are capable of exhibiting the ejaculatory response without sex hormone treatment in perinatal life or androgen treatment in adulthood. It was also demonstrated that there is a sex difference in the postejaculatory behavior shown by estrogen-treated male and female rats.
在成年期用性激素和电击处理的正常饲养、青春期后去势的雄性和雌性大鼠中观察射精模式。在一项初步实验中，3只接受50微克苯甲酸雌二醇（EB）和500微克孕酮（P）处理的雌性大鼠在遭受电击时表现出插入和射精行为。不应期异常短，几乎没有射精后发声。在实验1中，在测试日，雄性和雌性大鼠在每日用32微克EB处理（有或没有500微克P）后接受电击测试。射精前行为在雄性和雌性之间没有差异，但雌性表现出缩短的不应期且没有射精后发声。未观察到孕酮有作用。在实验2中，去势的雄性和雌性大鼠在每天用8微克EB处理3周后遭受电击。未给予P。雌性再次表现出显著缩短的不应期且发声很少。在实验3中，用睾酮丙酸酯（TP）处理并电击的雄性和雌性大鼠表现出射精模式、正常的不应期和发声。结果表明，雌性大鼠在围产期未接受性激素处理或成年期未接受雄激素处理的情况下能够表现出射精反应。还证明了经雌激素处理的雄性和雌性大鼠在射精后行为上存在性别差异。
