Routine Labs and Tests During Pregnancy

We will recommend a number of tests during your pregnancy. These tests are done to make sure that you and your baby are doing well.

Many are standard tests, while others may be recommended based on your age or health history.

Blood and Urine Tests

These tests are used to help identify conditions that can affect your health and that of your baby during pregnancy. At your first prenatal visit, we will ask you to have the following tests.


Test Checks For
Complete blood count Anemia (low iron in the blood)
Blood type, Rh, antibodies Your blood type, Rh status, blood group antibodies
Hepatitis antigen Hepatitis B
Serology Syphilis, a sexually transmitted disease
Rubella antibody Immunity to German measles
Urine Infections and kidney disease
HIV antibody Virus that causes AIDS


Depending on your health history, you may also be offered tests to check for:

Rh status

If you have Rh-negative blood and become pregnant with a baby that has Rh-positive blood, your body may have an immune reaction and produce Rh antibodies. This reaction is called Rh sensitization. If Rh antibodies develop, they can, in future pregnancies, attack an Rh-positive baby's blood cells and cause severe anemia in the baby. Rh antibodies don't affect an Rh-negative baby.

If you are Rh-negative, you will have another test for Rh antibodies during your third trimester. A medicine containing antibodies to the Rh factor (RhoGam) will be recommended if you have an amniocentesis, and also around 28 weeks. If you have a miscarriage or a threatened miscarriage, we may recommend RhoGam to prevent Rh sensitization.

Hepatitis B

Hepatitis B can be passed on to your unborn baby. If your blood test shows you have hepatitis B, your baby must be treated at birth and will need a hepatitis B vaccine twice more before 6 months of age. Even if you don't feel sick (not everyone who has the virus gets sick), you can pass the virus on to your unborn baby.

HIV antibody testing

Unless you say no to an HIV test, it will be included in your routine tests. HIV can be spread from an infected mother to her baby during pregnancy, birth, or breastfeeding. If an HIV infection is found during pregnancy, treatment can greatly reduce the chance that the baby will get HIV. An infected mother can also be treated.


Your health care provider may suggest an ultrasound. An ultrasound uses sound waves to create an image of your baby on a monitor. Ultrasound is considered safe for you and your baby.

An ultrasound can be helpful if:

Coverage and Questions

For more information about these tests or your pregnancy, please talk to your health care provider. Coverage for prenatal tests and exams varies by health plan. Certain tests, even if recommended, may not be covered depending on your health plan. Check your benefit booklet or contact Group Health Customer Service for information about your coverage for prenatal testing.

From the "Birth Day News" series.

Clinical review by Susan Warwick, MD
Group Health
Reviewed 08/05/2015