Menstruation is a special time for women, women can not do physical examination during menstruation, some items in the menstruation physical examination, may lead to inaccurate results. If women do gynecological ultrasound during menstruation, they will not be able to clearly see the changes in the endometrium due to pelvic congestion, and if they suffer from adenomyosis, the results will be affected, and if they have a blood test during menstruation, the hemoglobin and leukocyte values may be low due to low body resistance. It is better for women to do the checkup 3 days after menstruation. Only in a few cases, if women only need to check the 6 items of sex hormones, they can do the checkup on the 2-4th day of menstruation, during which the hormone level is lower and the checkup result is more accurate.