Pregnancy preparation tests are recommended after menstruation. For women who are planning to get pregnant, it is recommended to do the appropriate pregnancy preparation tests before getting pregnant. The purpose of the pregnancy test is to evaluate the woman’s physical condition, to detect as many factors as possible that may affect pregnancy, and to provide guidance on various factors during and after pregnancy. It is generally recommended that the pregnancy test be done 3-7 days after the menstrual period has cleared. This is because during this time period, when menstruation has just ended, the hormone levels in a woman’s body are relatively low and indicators in all areas are relatively stable, making it easier to detect abnormalities through a pregnancy test. If a woman needs to test her sex hormones or endometrial function, she needs to test her sex hormones during her menstrual period or have an endometrial biopsy before her period. Therefore, most of the pregnancy tests are conducted after menstruation, but the time may change for some special programs.