At 40 days after menopause, the pregnancy sac is usually visible if the usual menstrual cycle is regular at around 30 days. If your period is usually irregular and your menstrual cycle is long, you may not be able to see the pregnancy sac. Women’s periods are not always regular, so the number of days between menopause and the actual number of days of pregnancy can sometimes be very different. If menstruation is usually regular and the menstrual cycle is normal, the pregnancy sac can usually be seen on ultrasound at 40 days after menopause. If the menstrual cycle is usually long or irregular, the pregnancy sac may be found a little later. If the pregnancy sac is not visible on ultrasound at 40 days after menopause, it is necessary to combine the usual menstruation with the blood HCG for a comprehensive assessment, and to be alert to the possibility of ectopic pregnancy, and if it is suspected that ectopic pregnancy is occurring, it is necessary to consult a doctor in time for treatment. During pregnancy, you should pay attention to regular maternity checkups, and if any abnormality occurs, you should go to a regular hospital for medical checkups and treatment under the guidance of a doctor.