If you want to take a blood test to know if you are pregnant, you can take a blood test on 31 or 32 days of menopause to find out if you are pregnant, and if you are pregnant, you will have a positive result and your blood HCG will be more than 10 mIU/mL. If you do a health check after you are pregnant, it is recommended that you should preferably take an ultrasound test after 50 days of pregnancy to find out if the current embryo development matches the number of days of menopause and if the current It is also necessary to check the thyroid function, liver and kidney function, as well as to check whether the fetus is infected with viruses that cause fetal malformations, which is also known as the eugenics five items.