有人把恋爱——结婚——生育看成是爱情三部曲。男女青年选择终身伴侣,考虑前两部曲时,都有些条件和要求,如外表、思想品德、工作性质、性格爱好、家庭条件等,而对第三部曲——优生问题,还没有引起足够重视。对第三部曲应该注意些什么呢?首先,要避免近亲结婚,因为近亲结婚的后代,患遗传病多,低能儿多,或 Some people love - marriage - childbirth as a love trilogy. Young men and women choose lifelong companions, consider the first two songs, there are some conditions and requirements, such as appearance, moral character, nature of work, personality, family conditions, etc., and the third song - eugenics, has not caused enough Pay attention. What should be noted about the trilogy? First of all, to avoid the marriage of close relatives, because offspring marry offspring, with genetic disease, low energy and more, or