In recent years, the proportion of male infertility has been increasing year by year, in many cases caused by the poor quality of male semen, and even in some men there is no sperm in the semen at all, leading to difficulties in passing on the sperm to the next generation. Some of the male patients with oligospermia are caused by Y chromosome microdeletion, and over time, the number of sperm in the semen becomes less and less until there is no sperm. If we find this situation early, the semen is frozen and preserved, and later IVF technology is used to have their own offspring. Unfortunately, many people are unaware of this early on, until they are ready to have offspring after marriage. For this reason, we recommend that all men over 20 years old should have their semen routinely checked and if it is normal, OK, if it is abnormal, consider freezing and storing autologous sperm. One of the tasks of the Shaanxi Human Sperm Bank is fertility preservation. Also one of the obligations of Shaanxi Province Assisted Reproductive Technology Center is to perform free routine semen examination for premarital men. To relieve their worries.