Most prenatal DNA tests start with a simple blood draw from your arm, and you can get one at your OB-GYN’s office, a midwife’s practice, a maternal-fetal medicine clinic, or a national lab like Labcorp or Quest Diagnostics. Some tests can even be done at home with a mail-in kit. Where you go depends on what kind of DNA test you need and how far along you are.
Three Types of Prenatal DNA Tests
The phrase “DNA test while pregnant” can mean very different things depending on what you’re looking for. The three main categories are chromosomal screening (checking your baby’s health), paternity testing (confirming the biological father), and gender determination (finding out if you’re having a boy or girl). Each one is available at different locations, on different timelines, and at different price points.
Chromosomal Screening (NIPT)
Non-invasive prenatal testing, or NIPT, analyzes tiny fragments of your baby’s DNA that circulate in your bloodstream. It screens for conditions like Down syndrome and other chromosomal differences. The test is a standard blood draw from your arm, available as early as 10 weeks of pregnancy.
You can get NIPT through your OB-GYN, midwife, or maternal-fetal medicine specialist. Your provider orders the test, draws your blood (or sends you to a nearby lab), and the sample goes to one of several major testing companies. Brand names you may hear include MaterniT21, Harmony, Panorama, and QNatal Advanced. Labcorp also offers a direct-to-consumer option through Labcorp OnDemand, where you can purchase the test yourself without a doctor’s order.
NIPT is a screening test, not a diagnostic one. If it flags a potential concern, your provider will recommend a follow-up diagnostic test like amniocentesis or chorionic villus sampling (CVS) to confirm the result.
Insurance Coverage for NIPT
Whether insurance covers NIPT depends on your plan and your risk profile. Major insurers like UnitedHealthcare, Anthem, Aetna, and Cigna all cover NIPT for singleton pregnancies, and some cover twin pregnancies as well. Coverage criteria vary: some plans cover it for all pregnancies, while others (like TRICARE) limit it to high-risk cases, such as being 35 or older at delivery, having an abnormal ultrasound, or a history of a prior pregnancy with a chromosomal condition.
Some plans require prior authorization before the test is performed, which means your doctor may need to submit documentation showing why the test is appropriate. UnitedHealthcare and BCBS Federal Employee require prior authorization; Anthem, Aetna, and Cigna generally do not. If you’re unsure about your coverage, ask your OB’s office to check with your insurer before the blood draw. Without insurance, NIPT typically costs several hundred dollars, though many labs offer payment plans or financial assistance programs.
Diagnostic Tests: CVS and Amniocentesis
If your screening results suggest a potential problem, or if you have risk factors that warrant more definitive answers, your provider may recommend one of two diagnostic procedures. Chorionic villus sampling (CVS) takes a small tissue sample from the placenta and is performed between 10 and 13 weeks. Amniocentesis collects a sample of amniotic fluid and is done between 15 and 20 weeks. Both provide a definitive DNA-based diagnosis rather than a probability estimate.
These procedures are performed in hospitals, outpatient clinics, university medical centers, and some obstetricians’ offices, often at facilities called prenatal diagnostic centers. They require a specialist (typically a maternal-fetal medicine doctor) and ultrasound guidance. Your OB-GYN will refer you to the appropriate facility. These are not available as at-home or direct-to-consumer tests.
Prenatal Paternity Testing
If you need to determine who the biological father is before the baby is born, non-invasive prenatal paternity (NIPP) testing is available as early as eight weeks of pregnancy. Like NIPT, it works by analyzing fetal DNA in your blood. The potential father provides a cheek swab, and the lab compares the two samples.
Where you go depends on whether you need the results for legal purposes.
- Legal paternity test: Both parties must have their samples collected at a certified facility with a documented chain of custody. Labcorp operates collection centers across the country for this purpose. Results from a legal test can be used for child support, custody disputes, immigration cases, birth certificate amendments, and court orders.
- Non-legal (at-home) paternity test: You receive a kit by mail, collect cheek swab samples at home following the instructions, and send everything back to the lab. This gives you a private answer but cannot be used in court. Several companies offer this, and results typically arrive within a week or two.
Prenatal paternity tests are not typically covered by insurance. Expect to pay anywhere from a few hundred to over a thousand dollars depending on the provider and whether you need legal-grade results.
At-Home Gender Tests
If you simply want to find out your baby’s sex earlier than a standard anatomy ultrasound (usually done around 18 to 20 weeks), at-home gender test kits are available online without a doctor’s order. These kits work by detecting the presence or absence of the male Y chromosome in the fetal DNA circulating in your blood.
SneakPeek is one of the most popular options, available from six weeks of pregnancy and claiming 99.9% accuracy. Peekaboo offers a similar blood-based test starting at seven weeks. You receive a collection kit, prick your finger or draw a small blood sample at home, mail it to the lab, and get results by email within about a week (faster with expedited service).
The underlying science is sound, but at-home kits have more room for error than a test performed in a clinical setting. Several factors can throw off results:
- DNA contamination: If a male touches your test kit, a female baby could be falsely identified as male.
- Recent miscarriage: Residual fetal DNA from a prior pregnancy can linger in your blood.
- Twin or multiple pregnancy: Results may be unreliable with more than one baby.
- High BMI: Higher body weight can dilute the concentration of fetal DNA in your blood.
- Recent blood transfusion or stem cell transplant: Donor DNA can interfere with results.
Urine-based gender tests also exist (GENDERmaker and GenderBliss are two brands), but they contain very little DNA and are considerably less reliable. GenderBliss itself notes the test is “not for people who are looking for a 100% accurate result.” If accuracy matters to you, stick with a blood-based kit or wait for NIPT or ultrasound through your provider.
Choosing the Right Option
Your starting point depends on what question you’re trying to answer. For chromosomal screening, your OB-GYN or midwife’s office is the simplest path. They’ll order the test, draw your blood, and walk you through results. For paternity, look into Labcorp’s DNA testing services or other accredited labs, and decide upfront whether you need legally admissible results. For early gender, an at-home blood test kit is the fastest and most accessible route, though your provider can also tell you through NIPT or a mid-pregnancy ultrasound.
If you’re early in pregnancy and not sure what testing makes sense for you, bring it up at your first prenatal visit. Most providers discuss screening options between 8 and 12 weeks, which is the window when many of these tests first become available.