Schuiling G A, de Koning J, Zürcher A F
J Endocrinol. 1976 Sep;70(3):373-8. doi: 10.1677/joe.0.0700373.
Preovulatory LH surges were studied in rats with ovarian cycles of 4 days (4d-rats) and 5 days (5d-rats). In 5d-rats the maximal peak height was about twice that observed in 4d-rats, whereas in 4d-rats peaks occurred about 1-5 h later than in 5d-rats and were much less consistently timed. From experiments in which LH releasing hormone (LH-RH) was infused into pentobarbitone-blocked pro-oestrous rats, it was concluded that (a) differences between the two types of preovulatory LH surges originate within the central nervous system, and (b) pro-oestrous LH-RH secretion may not be restricted to the period in which increased LH levels in blood were found, but may exceed this period for a considerable time.
在具有4天卵巢周期的大鼠（4天周期大鼠）和5天卵巢周期的大鼠（5天周期大鼠）中研究了排卵前促黄体生成素（LH）高峰。在5天周期大鼠中，最大峰值高度约为4天周期大鼠中观察到的两倍，而在4天周期大鼠中，峰值出现时间比5天周期大鼠晚约1 - 5小时，且时间一致性差得多。通过将促黄体生成素释放激素（LH - RH）注入戊巴比妥阻断的动情前期大鼠的实验得出结论：（a）两种类型的排卵前LH高峰之间的差异源自中枢神经系统；（b）动情前期LH - RH分泌可能不限于在血液中LH水平升高的时期，而是可能在相当长的时间内超过这个时期。
