Whether or not a pregnancy blood test requires fasting depends on the test. If a woman is newly pregnant, a blood test for HCG (human chorionic gonadotropin) and progesterone is needed to make a diagnosis; usually, a fasting blood test is not needed because diet and mood do not have a direct effect on the production of HCG (human chorionic gonadotropin) and progesterone. However, the first time in early pregnancy the card is built for a comprehensive examination; blood tests must be done on an empty stomach at this time because thyroid function and liver and kidney function need to be checked, and these are tests that must be done on an empty stomach. Glucose tolerance test at about 24 weeks of pregnancy, also need to fasting blood draw; therefore, after pregnancy blood draw test program determines whether the need for fasting. There are many items that require blood tests after pregnancy, so it is best to ask your doctor before taking a blood test.