Having children is a human need to reproduce and every family has to take up this responsibility, as do families suffering from infertility. The advent of IVF has given many infertile families a new lease of life. The success of IVF does not only require the active participation of women, but men also play a very important role in the process. The following are some of the things that men need to pay attention to when preparing for IVF: 1. Three months before IVF, men should quit smoking and drinking, develop good habits, strengthen physical exercise and get a good night’s sleep. If men have inflammation of the reproductive system, they should be treated in a timely manner. 2, adjust the diet structure, in the first three months of in vitro began to eat more loach, white fungus stewed turtle, more supplement milk, eggs, fresh vegetables, fruits, fish, meat, it is best to eat some melons and fruits every day. Also eat more food containing zinc and selenium and other trace elements, such as chicken liver, egg yolk, shellfish, peanuts, potatoes, to promote sperm production and development. Try to reduce the intake of fried barbecue, trans fat, caffeine food or drinks. 3, in order to ensure the quality of sperm, men should avoid contact with high temperature environment before sperm retrieval, do not steam sauna, hot springs, hot baths, and do not wear tight pants, sedentary, long time riding bicycles, etc. 4, Men need to do a series of tests before IVF to ensure the quality of sperm. 5, 3-7 days before egg collection, the male partner needs to ejaculate once and then abstain from sex until the day of egg collection. Too long or too short retention of semen in the body can affect sperm quality. 6. Please wash your hands with water before semen collection, and then masturbate to retain semen. The semen collection cup is a disposable sterile cup. Be careful not to touch the edge of the cup, the inner wall of the cup and the inner surface of the lid, with the inner surface of the lid facing upward to avoid contamination. Avoid pubic hair, clothing fibers, etc. from falling into the semen cup. If a foreign body is accidentally dropped into the cup, the medical staff should be notified immediately to replace the sterile cup. Only by doing the above can high quality semen be taken out, which is conducive to the success of IVF.