Koto M, Miwa M, Togashi M, Tsuji K, Okamoto M, Adachi J
Jikken Dobutsu. 1987 Apr;36(2):195-8. doi: 10.1538/expanim1978.36.2_195.
A method for detecting the optimum day for mating in the rat was investigated. Cyclic changes of electrical impedance of vagina (EIV) were studied in the rats. EIV indicated high value (over 3,000 omega) only at proestrus, and it was lower (under 3,000 omega) at other stage of estrous cycle. These results apparently indicate that measuring the EIV made to distinguish proestrus from other phases of estrous cycle. The female caged with male showed high copulation rate (88 approximately 96%) when her EIV had been over 3,000 omega.
研究了一种检测大鼠最佳交配日的方法。对大鼠阴道电阻抗（EIV）的周期性变化进行了研究。EIV仅在发情前期显示高值（超过3000欧姆），而在发情周期的其他阶段则较低（低于3000欧姆）。这些结果显然表明，测量EIV可用于区分发情前期与发情周期的其他阶段。当雌性大鼠的EIV超过3000欧姆时，与雄性关在笼中的雌性大鼠显示出高交配率（约88%至96%）。
