A woman can usually find out that she is pregnant based on her history of menopause, early pregnancy response, and pregnancy test. 1. History of menopause. If a woman of childbearing age suddenly experiences a delay of more than 7 days in her regular menstrual cycle and has a history of unprotected sex, it is likely to be a sign of pregnancy. 2. Early pregnancy reaction. If there is a history of menopause, and there are symptoms of early pregnancy reaction such as drowsiness, lack of energy, nausea, vomiting, loss of appetite, breast tenderness, and deepening of the color of areola, etc., it is likely to be a sign of pregnancy. 3. Pregnancy test. Have no measures to sexual life history of women can be about 2 weeks after sex or regular menstrual delay of 7-10 days or so using pregnancy test paper or pregnancy test stick to test whether pregnancy, positive test results can be initially judged to be pregnant, you can also go to the hospital after one week of coitus to draw blood to check the blood HCG to determine whether there is a pregnancy or wait until the menopause of 6 weeks or so to ultrasound can find out whether there is a pregnancy.