Some other blood tests can be performed during menstruation, but they should be performed on an empty stomach. If a woman has a menstrual period, ultrasound examinations may cause blood to accumulate in the uterine cavity, which may affect the results of the examination. During menstruation, vaginal discharge examination and cervical cancer screening should not be performed. If a woman has a gynecological examination during her menstrual period, it is best to wait until after her period clears. The gynecological examination should be performed at least 3-7 days after menstruation, without sexual intercourse or vaginal medication, and with an empty stomach in the early morning.