采用物理、生化等技术措施 ,在中国林蛙卵发育的适当时期进行处理 ,能明显提高雌蛙的比例。试验结果表明 :用激素处理 ,雌蛙比例达到 73.3%～ 85.9% ,用化学离子处理可使雌蛙达到83.3%～ 91.6 % ,适宜的低温亦可使雌蛙比例有所提高。处理蛙卵的最适时期应控制在胚胎发育的 17～ 2 5发育期间 Using physical, biochemical and other technical measures, the development of Rana chensinensis eggs in the appropriate period for processing, can significantly increase the proportion of female frogs. The results showed that with the hormone treatment, the ratio of female to frog reached 73.3% ~ 85.9%, while that of female frog reached 83.3% ~ 91.6% with chemical ion treatment. The suitable low temperature also increased the ratio of female frog. The optimum period for handling frog eggs should be controlled during embryonic development 17 ~ 25 during development