How is a DNA test performed during pregnancy?

A DNA test during pregnancy is performed by drawing a small amount of blood from the mother's arm. The sample is sent to a lab where cell-free DNA from the placenta is isolated and analyzed. No special preparation is needed, and results are typically ready in 7–10 days.

Is NIPT covered by insurance in the US?

Most US insurance plans cover NIPT for pregnancies considered high-risk, such as maternal age 35 or older, abnormal ultrasound findings, or a family history of genetic disorders. Out-of-pocket costs can range from a few hundred to under a thousand dollars, though some labs offer self-pay discounts.

What is the difference between NIPT and carrier screening?

NIPT screens for chromosomal abnormalities in the fetus, such as trisomies, using cell-free DNA from the placenta. Carrier screening tests the parents for recessive gene mutations that could be passed to the child, such as cystic fibrosis or spinal muscular atrophy. Both can be done during pregnancy.

How is a DNA test performed during pregnancy?

A DNA test during pregnancy is performed by drawing a small amount of blood from the mother's arm. The sample is sent to a lab where cell-free DNA from the placenta is isolated and analyzed. No special preparation is needed, and results are typically ready in 7–10 days.

Is NIPT covered by insurance in the US?

Most US insurance plans cover NIPT for pregnancies considered high-risk, such as maternal age 35 or older, abnormal ultrasound findings, or a family history of genetic disorders. Out-of-pocket costs can range from a few hundred to under a thousand dollars, though some labs offer self-pay discounts.

What is the difference between NIPT and carrier screening?

NIPT screens for chromosomal abnormalities in the fetus, such as trisomies, using cell-free DNA from the placenta. Carrier screening tests the parents for recessive gene mutations that could be passed to the child, such as cystic fibrosis or spinal muscular atrophy. Both can be done during pregnancy.

How to Do a DNA Test During Pregnancy: A Complete Guide for 2026

Learn how to do a DNA test during pregnancy with NIPT, carrier screening, and more. A US-focused guide to prenatal DNA testing options in 2026.

A DNA test during pregnancy is typically performed through a simple blood draw from the mother, which isolates cell-free DNA from the placenta to screen for genetic conditions. The most common method is non-invasive prenatal testing (NIPT), also known as cell-free DNA screening, which can be done as early as 10 weeks of gestation. This guide explains the types of prenatal DNA tests available in the United States in 2026, how they work, and how they lead naturally to ordering a comprehensive prenatal screening panel.

What Is a DNA Test During Pregnancy?

A DNA test during pregnancy analyzes fetal genetic material to assess the risk of chromosomal abnormalities, such as Down syndrome (trisomy 21), Edwards syndrome (trisomy 18), and Patau syndrome (trisomy 13). It can also screen for sex chromosome conditions and, in some cases, microdeletions. Unlike invasive procedures, NIPT poses no risk of miscarriage and is recommended by the American College of Obstetricians and Gynecologists for all pregnancies. The test uses a maternal blood sample to measure the fetal fraction, which is the proportion of cell-free DNA from the placenta circulating in the mother's bloodstream.

Types of Prenatal DNA Tests

Non-Invasive Prenatal Testing (NIPT)

NIPT is the most common DNA test during pregnancy. It analyzes cell-free DNA from the placenta and can be performed from 10 weeks onward. Results typically arrive within 7–10 business days. NIPT is highly accurate for common trisomies, with detection rates above 99% for trisomy 21. It is not diagnostic; a positive result should be confirmed with chorionic villus sampling (CVS) or amniocentesis.

Carrier Screening

Carrier screening is a DNA test that identifies whether a parent carries a gene for certain recessive disorders, such as cystic fibrosis, spinal muscular atrophy (SMA), or fragile X syndrome. It can be done before or during pregnancy using a blood or saliva sample. Many US providers now offer expanded carrier screening panels that test for hundreds of conditions. A genetic counselor can help interpret results and discuss reproductive options.

First-Trimester Screening and Integrated Screening

First-trimester screening combines a blood test (measuring PAPP-A and hCG) with a nuchal translucency ultrasound. Integrated screening adds second-trimester blood markers (quad screen) to improve accuracy. These are not DNA tests per se but are often offered alongside NIPT to assess risk for neural tube defects and chromosomal abnormalities.

How to Order a DNA Test During Pregnancy

Consult your OB-GYN or midwife to discuss which test is right for you based on your age, family history, and preferences.
Choose a CLIA-certified lab that offers NIPT and carrier screening. Many allow at-home blood collection kits with a return mailer.
Provide a blood sample (usually drawn at a lab or via a mobile phlebotomist). No special preparation is needed.
Wait for results, which are typically available in 7–10 days. Your provider or a genetic counselor will review them with you.
If results show increased risk, follow up with diagnostic testing such as CVS (10–13 weeks) or amniocentesis (15–20 weeks).

Comparison of Common Prenatal DNA Tests

Test Type	Timing	Sample	What It Screens
NIPT (cell-free DNA)	10 weeks onward	Maternal blood	Trisomies 21, 18, 13; sex chromosomes; some microdeletions
Carrier screening	Any time (preconception or prenatal)	Blood or saliva	Recessive gene mutations (e.g., CF, SMA, fragile X)
CVS (invasive)	10–13 weeks	Chorionic villus tissue	Diagnostic for chromosomal abnormalities
Amniocentesis (invasive)	15–20 weeks	Amniotic fluid	Diagnostic for chromosomal and neural tube defects

Important Considerations for US Patients

Insurance and Cost

Most US insurance plans cover NIPT for high-risk pregnancies (e.g., maternal age 35+, abnormal ultrasound). Out-of-pocket costs typically range from a few hundred to under a thousand dollars, though some labs offer self-pay discounts. Carrier screening is often covered as well, but check with your insurer. A genetic counselor can help you understand coverage and options.

Accuracy and Limitations

NIPT is a screening test, not a diagnosis. False positives can occur, especially for rare conditions. The fetal fraction must be above a certain threshold (usually 4%) for reliable results; low fetal fraction may lead to a failed test, requiring a redraw. Invasive tests like CVS and amniocentesis carry a small risk of miscarriage (approximately 1 in 300 to 1 in 500).

Prenatal Paternity Test

A prenatal paternity test can determine fatherhood during pregnancy using NIPT (cell-free DNA) from the mother and a cheek swab from the alleged father. This is a separate DNA test and is not part of standard medical screening. It is available through private labs in the US and is often used for legal or personal reasons.

Next Steps: Order a Comprehensive Prenatal Screening Panel

If you are ready to take the next step, you can order a prenatal screening panel online that combines NIPT and carrier screening for a complete picture of your baby's genetic health. Results are typically delivered within 7–10 days, and a genetic counselor is available to answer your questions. This simple blood test gives you peace of mind and valuable information for your pregnancy journey.