Blood tests for early pregnancy are more accurate because if a woman’s blood test indicates an elevated HCG level after menopause or 3-5 days after sex, it usually indicates that she is pregnant. However, the blood HCG level is only a criterion to determine whether the pregnancy is intrauterine or ectopic, which is not reflected by the blood HCG level alone, but requires an ultrasound test at the hospital. The ultrasound test should be performed at least 5 weeks after menopause and can be performed at 5, 6 or 7 weeks after menopause to determine whether the pregnancy is intrauterine or ectopic. Generally, ultrasound can indicate whether the fetal heartbeat and the baby’s development are normal or not after 6 weeks of menopause. For the determination of intrauterine or ectopic pregnancy, it is necessary to wait for more than 5 weeks of menopause for the ultrasound to determine the pregnancy.