从1979年7～8月到1981年1～2月,笔者用大剂量复方甲地孕酮片(口服避孕片2号)对雌犬生殖能力的影响进行了观察,现报导如下:用发育正常具有生殖能力的雌犬6只,年龄3～4岁,体重在15～20公斤之间.分为实验及对照两组,每组3只,两组都任其自由活动,喂养方法也跟平时一样,不作任何改变.1979年上半年雌犬 From 1979 July to August 1981 to January 1981, the author with a large dose of megesterone tablets (oral contraceptive tablets No. 2) on the reproductive capacity of female dogs were observed, are reported as follows: with normal development Female reproductive capacity of 6 dogs, aged 3 to 4 years old, weighing 15 to 20 kg. Divided into experimental and control groups of two, each group of three, both free their own activities, feeding methods also with the usual Similarly, without any change in the first half of 1979 female dog