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当前,在医学上已应用人类试管内受精技术以及将受精卵再植入子宫之际,回顾有关人类生殖及生殖失败的知识是有益的。通过人口调查,人类的受孕率(一个性生活正常的妇女,每个月经周期怀孕并能出生一个活婴的可能性)估计约为20—25％,与家养的哺乳动物比较,人类的受孕率是比较低的。我们能提出两种假设:1) 每个月经周期受精率比较低。2) 受精的百分率是满意的,
At present, with the medical application of IVF techniques and the replantation of fertilized eggs into the uterus, it is helpful to review the knowledge of human reproductive and reproductive failure. According to the census, the rate of conception among human beings (the probability of a woman of normal sex who is pregnant during each menstrual cycle and is able to give birth to a newborn baby) is estimated to be about 20-25%. Compared with domestic mammals, the rate of human pregnancy Is relatively low. We can make two hypotheses: 1) The fertility rate of each menstrual cycle is relatively low. 2) The percentage of fertilization is satisfactory,