The role played by the preoptic region and the hypothalamus in spontaneous ovulation and ovulation induced by progesterone.

摘要: In female rats, cuts were made with the use of Halasz technique around preoptic area, leaving connections between area and hypothalamus intact. Such do not interfere spontaneous ovulation, as opposed to at level optic chiasm. addition, effects on progesterone-induced secretion gonadotrophins studied. acute experiments, these blocked activity progesterone injected third day dioestrus 5-day cycle or pro-oestrus 4-day cycle. However, in chronic pro-oestrus, followed by pentobarbital, did induce ovulation.