We tested the effect of contraceptive compound of levonorgestrel and quinestrol (coded as EP 1) on the fertility of female Brandt?s voles, gray hamster and mid day gerbils.

• 本文首次报道一种由左炔诺孕酮和雌醚配伍制成的复方避孕药物 (代号 :EP 1 )对雌性布氏田鼠、灰仓鼠和子午沙鼠的不育效果 ,目的在于检验其能否用于野鼠的生育率控制。