The blood test for pregnancy is usually a blood test for progesterone and chorionic gonadotropin. It is recommended that the patient bleeds 10 days after the last intercourse, in which case the test results are more accurate and generally do not lead to false negatives due to the relatively short period of pregnancy. After the blood is drawn, the patient can observe the specific value to determine whether or not she is pregnant. If the patient’s value, chorionic gonadotropin, is between 0 and 10 mIU/mL, it means that the patient is not pregnant. In general, a value of about 25 mIU/mL indicates the possibility of pregnancy. When the patient’s chorionic gonadotropin is greater than 200 mIU/mL at the first test after pregnancy, it indicates that the patient has a relatively well-developed gestational sac. For progesterone, a level greater than 15 ng/mL after the patient is found to be pregnant indicates that the patient’s gestational sac is generally developing at a good level. If it is less than 15ng/mL, it indicates a poorly developed embryo or the possibility of ectopic pregnancy. If the patient’s progesterone is less than 5ng/mL, it indicates that the embryo may have stopped developing.