For women with regular menstrual cycles, a round or oval-shaped gestational sac is visible in the uterine cavity after vaginal ultrasound about 35 days after menopause. Menopause is usually measured from the 1st day of the last menstrual period. In women with regular menstrual cycles, the menstrual cycle is delayed for about 10 days, and a pregnancy sac is seen by examining the ultrasound, and at 6 weeks of gestation, fetal buds and primitive heart tube pulsation can be seen. There is no need to rush to do ultrasound examination for a few days of delayed menstruation, usually it is normal for menstruation to be delayed for 3-5 days. If a woman is anxious to know whether she is pregnant or not, she can usually use early pregnancy test after 1 week of delayed menstruation. Test strips are an easy way to save time in the queue, but the final determination of a normal intrauterine pregnancy is made by ultrasound. When it is determined to be intrauterine pregnancy, you need to take obstetric tests on time during pregnancy to keep abreast of the development of the fetus.