Labcorp and its Specialty Testing Group, a fully integrated portfolio of specialty and esoteric testing laboratories.

Week 13 to end of week 26

Second Trimester Testing

A number of lab tests are suggested for all women as part of routine prenatal care.  These tests can help confirm that you are healthy and determine if you have risks for you and your baby. Talk to your doctor about what tests are right for you.

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Carrier Screening

Screening for you and your partner. Most babies are born healthy. However, everyone has genetic mutations which can be passed on to his or her baby. Carrier screening can help determine if your child is at risk for specific disorders such as cystic fibrosis. Carrier testing is usually performed on you first. If the test is positive, your partner should be tested.


Non Invasive Prenatal Testing (NIPT)

Screening for your baby. With a simple routine blood draw early in your pregnancy, NIPT screening will check the genetic health of your baby and rule out some specific conditions that could affect your baby’s health and development.

Serum Screening

Maternal Serum Screening (part 2)

As an alternative to genetic testing, maternal serum screening tests help determine if your child is at risk for specific disorders. Your provider may have ordered a test in your first trimester, and so your doctor may order the second part of this testing, or a test that complements the information provided by NIPT, called Maternal Serum Alpha-Fetoprotein (MSAFP). Sometime second-trimester screening is coupled with an ultrasound, or other medical procedures.

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Genetic Counseling

Genetic information and knowledge is changing rapidly, and understanding your genetic testing choices can be complicated, so it is important to have a trusted source for gaining answers to your questions.

Our expert, board-certified genetic counselors work with you and your doctor to help you understand your genetic risks and testing options. You may talk with a genetic counselor when you are considering genetic testing, or to discuss the results of your genetic testing.

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Gestational Diabetes Screening

The second trimester Gestational Diabetes Screening and your choice in glucose beverages.
Labcorp patients now have a choice in glucose beverages. You may choose between a traditional glucose beverage (available through your physician or laboratory) or a natural Non-GMO option, called The Fresh Test™. This can be purchased at  Use discount code LABCORP at checkout.  
The American Diabetes Association (ADA) recommends screening for Gestational Diabetes Mellitus (GDM) between 24–28 weeks.1  To screen for GDM, you will take an initial glucose load test for which you will need to consume a 50-gram glucose beverage an hour prior to a plasma glucose test. The plasma glucose test is performed by appointment at one of Labcorp’s Patient Service Centers or your physician’s office. Order your glucose beverage today so that it arrives in time for your scheduled glucose load test appointment. 
Gestational Diabetes affects 7% of pregnant women2. Uncontrolled GDM poses risks including, but not limited to, preterm birth, fetal anomalies, preeclampsia, macrosomia, neonatal hypoglycemia, neonatal hyperbilirubinemia and a higher risk of developing diabetes post-partum1

Please consult with your healthcare provider if you will be taking the 50-gram, 75-gram or 100-gram glucose test as they have different requirements.  


  1. Management of Diabetes in Pregnancy: Standards of Medical Care in Diabetes—2019. Diabetes Care. 2019;42(Supplement 1):S165. doi:10.2337/dc19-S014
  2. March of Dimes. Gestational Diabetes. Accessed March 11, 2021.