You can have sex the night before the physical examination, if the items of the physical examination are just some general items, such as blood sugar, blood lipids, liver function, kidney function, and electrocardiogram examination. However, if the physical examination involves gynecological vaginal mucus cytology, try not to have sex the night before to avoid affecting the accuracy of the test results. In addition, women should not undergo gynecologic vaginal examinations during their menstrual period, nor should they undergo transvaginal ultrasound examinations. In the case of endocrine hormone 6 blood tests, the blood should be drawn on the second or third day of menstruation.