After pregnancy, blood chorionic gonadotropin is somewhat more diagnostic than progesterone. Chorionic gonadotropin is secreted by the body after pregnancy and doubles as the number of days of menopause increases. Therefore, by monitoring the level of chorionic gonadotropin in the blood, it is possible to reflect the activity of the embryo. However, if there are no signs of preeclampsia, that is, there is no lower abdominal pain and no vaginal bleeding. In addition, there is no previous history of adverse maternal outcomes, such as preeclampsia, multiple biochemical pregnancies, or recurrent miscarriages, progesterone is not mandatory, i.e., ketone is not a routinely recommended test. This is because there is no normal standardized value for progesterone and no correct reference range.