The answer is not necessarily due to pregnancy. If a woman’s menstrual period is delayed for 20 days, and if she had sex without contraception last month, or if the contraceptive measures taken were inappropriate, the first thing you need to do is to check and rule out whether the delayed menstrual period is caused by pregnancy, because there are other reasons that may cause the delayed menstrual period, such as endocrine reasons. Therefore, if a woman has delayed menstruation for 20 days, she needs to go to the gynecology department of a public hospital in a timely manner, gynecological ultrasound examination of the uterus, ovaries, fallopian tubes, the thickness of the endometrium, and at the same time, take a blood test, the human chorionic gonadotropin, that is, HCG test or urine pregnancy test, first of all, you need to rule out pregnancy, and then consider that it’s a menstrual disorders, and can be used to invigorate blood circulation and remove blood stasis of Chinese medicine with the addition of If you are sure that you are pregnant, you should have an obstetric examination according to your doctor’s opinion.