Prior to IVF, the male partner is required to go for spermatization about 3 to 7 days in advance. Couples undergoing IVF need the male partner to perform spermulation on the day of the woman’s egg retrieval in order to obtain fresh sperm to fertilize and match with the eggs obtained from the woman to form an embryo. Therefore, prior to IVF egg retrieval, the male partner should ovulate 3 to 7 days in advance to ensure that ovulation on the day of egg retrieval is no more than 7 days and no less than 3 days. If the male partner’s spermatozoa is more than 7 days or shorter than 3 days on the day of egg retrieval, it may lead to a decrease in the quality of semen or a decrease in the number of fresh ones, which may affect the fertilization of the eggs. In addition, the quality of the sperm is better and the quality of the embryo is relatively better if the sperm is prohibited from sexual intercourse for 3 to 7 days.