Infertility checkups can be done at any time, as there are many causes of infertility, and the items that need to be checked are also different, and the checkup time for different checkups is also different. If you need to do blood endocrine sex hormone test, it is best to do the test within 2~5 days during menstruation. If a tubal imaging test is needed, it is best to do the test about 3~7 days after the end of menstruation. Other tests such as uterine examination and uterine adnexa examination can be avoided during menstruation. Before the infertility test, men should abstain from sexual intercourse for 3~5 days and women should preferably not have intercourse for 3~7 days after the end of menstruation. There are many causes of infertility, such as low sperm viability and poor sperm motility in men, blocked fallopian tubes, ovarian failure to ovulate, uterine developmental abnormalities and gynecological infections in women.