Men are generally advised to abstain from alcohol for at least 90 days prior to conception. Alcohol ingested into the human body may affect the male sperm viability, may cause the male sperm quality to decline, which is not only not conducive to female conception, but also may lead to the fetus health to be affected to a certain extent. By abstaining from alcohol for 90 days or about three months, the sperms previously affected by alcohol in the body can wither away, ensuring that the quality of the newborn sperms will be restored to their previous peak level, which will be conducive to conception, thus achieving the goal of eugenic fertilization. Meanwhile, it is recommended that during the preparation of men for pregnancy, they can eat more high-protein foods in moderation, such as seafood, milk, eggs, soy products, in order to improve the quality of male sperm. At the same time, it should be noted that, in addition to abstaining from alcohol, men had better increase their own physical exercise, and if necessary, can go to the hospital for regular examination of semen routine, to determine the sperm viability.