How Long Does Genetic Testing Take During Pregnancy?

Wondering how long genetic testing takes during pregnancy? From NIPT to carrier screening, get typical turnaround times for US patients. Learn more here.

Genetic testing during pregnancy typically takes anywhere from a few days to two weeks for results, depending on the specific test type. For most non-invasive prenatal testing (NIPT) using cell-free DNA, results are usually available in 7 to 10 business days after the blood draw. Carrier screening and first-trimester screening often return within 5 to 12 days. This guide explains the timelines for each major prenatal screening option in the US market, helping you plan your prenatal care with confidence in 2026.

Understanding the Types of Prenatal Genetic Tests and Their Timelines

Prenatal genetic testing is divided into screening tests (which estimate risk) and diagnostic tests (which confirm a condition). Each has a different turnaround time. Below we break down the most common options.

Non-Invasive Prenatal Testing (NIPT) – Cell-Free DNA Screening

NIPT analyzes small fragments of fetal DNA circulating in the mother's blood. It screens for common chromosomal conditions such as trisomy 21 (Down syndrome), trisomy 18, and trisomy 13. Results typically take 7 to 10 business days from the date the lab receives the sample. Some labs offer expedited processing in 5 days. The test can be done as early as 10 weeks of pregnancy.

Carrier Screening

Carrier screening checks whether you or your partner carry a gene for certain inherited disorders (e.g., cystic fibrosis, spinal muscular atrophy, fragile X syndrome). This is often done via a blood or saliva sample. Turnaround time is usually 5 to 12 business days, though expanded panels that test for hundreds of conditions may take up to two weeks. Many providers now offer results in under a week.

First-Trimester Screening (Combined Screening)

This includes a blood test (measuring PAPP-A and hCG) plus a nuchal translucency ultrasound. The blood test results are typically available in 2 to 5 business days, and the ultrasound is interpreted immediately. A combined risk score is provided after both components are completed, usually within a week.

Quad Screen (Second-Trimester Screening)

Performed between 15 and 22 weeks, the quad screen measures four substances in the mother's blood. Results are generally returned in 3 to 7 business days.

Integrated Screening

Integrated screening combines first-trimester and second-trimester results into a single risk assessment. Because it involves two blood draws (one at 11–13 weeks and another at 15–18 weeks), the final result is not available until after the second blood draw, typically within 1 to 2 weeks after the second sample.

Diagnostic Tests: Chorionic Villus Sampling (CVS) and Amniocentesis

These tests are invasive and are usually offered after a positive screening result or for women over 35. They provide a definitive diagnosis but take longer for final results.

Note: FISH (fluorescence in situ hybridization) is a rapid test that checks for common chromosomal abnormalities, but it is not as comprehensive as a full karyotype.

Factors That Can Affect Turnaround Time

• Lab volume: Busy labs may take longer, especially during peak seasons.
• Sample quality: A low fetal fraction in NIPT may require a redraw, adding 5–7 days.
• Shipping time: Samples sent from remote locations may add 1–2 days.
• Weekends and holidays: Most labs count business days only.
• Genetic counselor review: Some results are reviewed by a genetic counselor before release, which can add 1–2 days.

What to Expect After Your Test

Once the lab processes your sample, results are sent to your healthcare provider or directly to you via a secure portal. Many US labs now provide online access. If results are abnormal, your provider or a genetic counselor will discuss next steps, including possible diagnostic testing with CVS or amniocentesis.

Why Timing Matters in Prenatal Care

Knowing the turnaround time helps you schedule tests early enough to allow for follow-up decisions. For example, if NIPT indicates a high risk for a condition, you may want to consider CVS (available only up to 13 weeks) or amniocentesis (after 15 weeks). Early results also give you more time to meet with a genetic counselor and plan for your baby's care.

If you are ready to take the next step in your prenatal journey, order a prenatal screening panel online and receive comprehensive results quickly, directly from a trusted US lab.