Where to Get a Prenatal Paternity Test

Find where to get a prenatal paternity test in the US. Learn about non-invasive cell-free DNA paternity testing before birth and order a comprehensive screening panel.

For those wondering where to get a prenatal paternity test in 2026, the most reliable option is a non-invasive prenatal paternity test (NIPP) using cell-free DNA from a simple blood draw. This guide explains how this test works, where to find it in the United States, and how it fits into a broader prenatal screening plan that includes NIPT, carrier screening, and other essential panels.

What Is a Prenatal Paternity Test?

A prenatal paternity test determines the biological father of a fetus before birth. Historically, this required invasive procedures like chorionic villus sampling (CVS) or amniocentesis, which carry a small risk of miscarriage. Today, non-invasive prenatal testing (NIPT) using cell-free DNA has made paternity testing safer and more accessible. The test analyzes fetal DNA fragments circulating in the mother’s blood, compares them to a DNA sample from the alleged father, and provides a result with a probability of paternity typically exceeding 99.9%.

Non-Invasive Prenatal Paternity Testing (NIPP)

NIPP is a type of prenatal screening that uses cell-free DNA. It can be performed as early as the 7th week of pregnancy, requires only a maternal blood draw and a cheek swab from the alleged father, and poses no risk to the fetus. The test relies on the fetal fraction—the proportion of fetal DNA in the mother’s bloodstream—which must be adequate for accurate analysis. If the fetal fraction is too low, a repeat draw may be needed later in the first trimester.

How Non-Invasive Prenatal Paternity Testing Works

Cell-Free DNA Analysis

During pregnancy, small fragments of fetal DNA cross the placenta and enter the mother’s circulation. A blood sample from the mother is collected, and the lab isolates the cell-free DNA. The alleged father provides a DNA sample (usually a cheek swab). The lab then compares specific genetic markers (short tandem repeats, or STRs) between the fetal DNA and the father’s DNA to confirm or exclude paternity.

Fetal Fraction and Timing

The fetal fraction increases with gestational age, typically reaching 10–15% by the second trimester. Most laboratories require a minimum fetal fraction of 3–4% to produce a reliable result. If the test is done too early, the fetal fraction may be insufficient, leading to a “no-call” result. Genetic counselors often recommend waiting until at least 9–10 weeks gestation to reduce the chance of needing a repeat blood draw.

Accuracy and Timing

NIPP is highly accurate, with reported probabilities of paternity exceeding 99.9% when the alleged father is included, and 100% exclusion when he is not the biological father. However, no test is perfect. False results can occur due to rare biological events such as vanishing twin syndrome, bone marrow transplant, or recent blood transfusion. Consulting a genetic counselor before testing can help clarify these risks.

When to Get a Prenatal Paternity Test

Most non-invasive prenatal paternity tests are available from the 7th week of pregnancy onward. The optimal window is between 9 and 12 weeks, when the fetal fraction is typically sufficient. Results are usually available within 3–5 business days after the lab receives both samples.

Where to Get a Prenatal Paternity Test in the US

Several types of facilities offer prenatal paternity testing:

• Clinical laboratories – Many independent CLIA-certified labs accept doctor referrals or direct-to-consumer orders. They often provide a kit for the alleged father’s sample and coordinate the maternal blood draw at a local patient service center.
• Online ordering platforms – Some companies let you order the test online, then schedule a blood draw at a nearby lab. This is convenient for women who want to manage the process privately.
• Obstetrician or genetic counselor offices – Your provider can order the test for you, and may also recommend a comprehensive prenatal screening panel at the same time to assess fetal health and carrier status.

Below is a comparison of prenatal paternity test methods:

Why Choose a Comprehensive Prenatal Screening Panel?

While a prenatal paternity test addresses a specific question, a comprehensive prenatal screening panel provides a broader picture of fetal and maternal health. Many women choose to combine NIPP with standard first-trimester screening, NIPT for chromosome abnormalities, and carrier screening for conditions like cystic fibrosis, spinal muscular atrophy, and fragile X syndrome. This integrated approach, sometimes called integrated screening, allows you to make informed decisions early in pregnancy.

NIPT and Carrier Screening

Non-invasive prenatal testing (NIPT) screens for trisomies 21, 18, and 13, as well as sex chromosome aneuploidies. Carrier screening identifies if you or your partner carry genes for recessive disorders. Together, these tests offer valuable information without the risks of invasive procedures. Your genetic counselor can help you interpret results and decide if additional diagnostic steps (such as amniocentesis) are needed.

Ordering a Prenatal Screening Panel Online

If you are ready to take a proactive step toward understanding your pregnancy, you can easily order a comprehensive prenatal screening panel from the comfort of your home. Many services provide a simple online process, a blood draw at a nearby lab, and results delivered directly to your secure portal. Do not wait—early knowledge supports better decisions and peace of mind. order a prenatal screening panel online and get your results quickly.