If the blood test is positive, most of them are pregnant, but some medical diseases may also cause an increase in blood HCG, for example, in the case of cirrhosis of the liver, the blood HCG may be elevated, so it is recommended to take into account the clinical history and whether there is a history of menopause. If the blood HCG is doubled on the next day, it indicates pregnancy, because even in the case of cirrhosis, the blood HCG is not doubled on the next day. You can go to the hospital for an ultrasound examination at around 45-50 days after menopause, mainly to find out the location of the gestational sac and to confirm that the pregnancy is intrauterine so that the pregnancy can continue.