Most medical examinations can be done during menstruation, as the results are not greatly affected by the examination during menstruation, so it is sufficient to maintain a normal diet three days before the examination, not to drink alcohol and to avoid strenuous exercise. However, in the case of gynecological sex hormone tests and urine tests, you need to avoid menstruation. If the purpose of the blood test is to test liver function, kidney function, A function, blood routine, blood clotting and other items, it is generally not affected by menstruation, where liver function and kidney function can be done on an empty stomach. However, if the test is for sex hormone six, it is best to have the blood drawn on an empty stomach two days after menstruation. In addition, routine urine tests should also avoid the menstrual period, as menstrual blood may contaminate the urine, and menstrual blood and nephrogenic red blood cells are indistinguishable, making the urine test more red blood cells and leading to false-positive results.