A woman with regular periods can test whether she is pregnant by morning urine at least one week after menopause, and early pregnancy reactions can appear at about six weeks after menopause. Early pregnancy reactions include symptoms such as chilliness, dizziness, weakness, drowsiness, preference for acidic food, aversion to greasy food, nausea, morning sickness, etc. You can also infer whether you are pregnant based on early pregnancy reactions, but of course the most accurate one is the pregnancy test in urine and blood. The main purpose of ultrasonography in early pregnancy is to determine intrauterine pregnancy and to exclude ectopic pregnancy, trophoblastic disease, etc. In summary, a positive blood or urine pregnancy test indicates pregnancy, but it should also be combined with ultrasound to determine if the pregnancy is intrauterine, and a fetal bud and primordial heartbeat can be seen on ultrasound at six weeks of menopause.