Yes, STD testing is a standard part of prenatal care in the United States. Every pregnant woman is screened for several sexually transmitted infections at her first prenatal visit, regardless of symptoms or perceived risk. The CDC recommends universal testing for syphilis, HIV, hepatitis B, and hepatitis C during every pregnancy, with additional screenings for chlamydia and gonorrhea based on age and risk factors.
What Gets Tested at the First Prenatal Visit
At your first prenatal appointment, typically in the first trimester, bloodwork and urine or swab samples will cover a panel of infections. The standard tests include syphilis, HIV, hepatitis B (using a blood test for a protein on the virus’s surface), and hepatitis C. These four are recommended for all pregnant women, no exceptions, even if you were tested or vaccinated before a previous pregnancy.
Chlamydia and gonorrhea screening follows slightly different rules. If you’re under 25, you’ll be tested for both at that first visit. If you’re 25 or older, testing is recommended only if you have risk factors like a new sexual partner, multiple partners, or a partner who has an STI. In practice, many providers test everyone to be safe, but the formal guidelines use 25 as the dividing line.
How HIV Testing Works During Pregnancy
HIV screening in pregnancy uses what’s called an “opt-out” approach. Your provider will notify you that an HIV test is being included as part of your routine prenatal bloodwork, and it will be performed unless you specifically decline. You don’t need to sign a separate consent form or request it. The test simply happens alongside everything else unless you say no.
This approach exists because early detection of HIV during pregnancy allows treatment that dramatically reduces the chance of passing the virus to the baby. Most states follow the opt-out model. In Texas, for instance, providers verbally tell you the test will be done unless you object. In Georgia, the law requires testing unless you actively refuse. A few states handle consent slightly differently, but the general principle across the country is that HIV testing is built into standard care rather than treated as something you need to ask for.
Third Trimester Re-testing
Some women are tested again later in pregnancy, ideally before 36 weeks. Repeat testing isn’t automatic for everyone. It depends on your risk profile and where you live.
For HIV, third-trimester re-testing is recommended if you have any of these risk factors: a new sexual partner during pregnancy, multiple partners, a partner living with HIV, injection drug use, an STI diagnosed during the pregnancy, or receiving care at a facility with higher HIV rates. Some states also require third-trimester testing by law regardless of individual risk.
Chlamydia and gonorrhea follow a similar pattern. If the risk factors that triggered your initial test are still present, you’ll be retested in the third trimester to protect both you and the baby from complications during and after delivery. Syphilis re-testing happens on a slightly different timeline: at 28 weeks and again at delivery for women living in communities with high syphilis rates or who have risk factors like drug use, a new partner, or a diagnosed STI during pregnancy.
Why These Tests Matter for the Baby
STD screening during pregnancy isn’t just about the mother’s health. Many of these infections can cross the placenta or pass to the baby during delivery, sometimes with devastating results.
Syphilis is the starkest example. Untreated syphilis carries up to an 80% increased risk of serious pregnancy complications, including stillbirth, premature birth, and congenital syphilis in the newborn. Babies born with congenital syphilis can develop severe anemia, organ damage, respiratory failure, and skin lesions. The critical detail is that treatment in the first trimester prevents congenital syphilis entirely. Women who are treated late or inadequately are nearly four times more likely to pass the infection to their baby.
Chlamydia and gonorrhea can infect the baby during vaginal delivery, potentially causing eye infections and pneumonia. Hepatitis B can be transmitted at birth, leading to chronic liver infection in the child. HIV, when detected early, can be managed with treatment during pregnancy to reduce transmission risk to less than 1%. Each of these outcomes is preventable when the infection is caught through routine screening.
What the Tests Actually Involve
Most of this screening happens through a single blood draw at your first prenatal visit. That one sample covers HIV, syphilis, hepatitis B, and hepatitis C. Chlamydia and gonorrhea testing typically uses either a urine sample or a vaginal swab, which can sometimes be self-collected.
You won’t necessarily know which individual tests are being run unless you ask or review your lab orders. Because so much of it is bundled into routine prenatal panels, many women go through the entire process without realizing they’ve been screened for STDs. If anything comes back positive, your provider will contact you to discuss treatment options. Most of these infections are treatable during pregnancy, and early treatment is what makes the difference in outcomes for both mother and baby.
State Laws Add Another Layer
Beyond the CDC’s clinical recommendations, most states have their own laws requiring specific prenatal STD screenings. The details vary. Some states mandate testing for syphilis, HIV, hepatitis B, hepatitis C, chlamydia, and gonorrhea all at the initial prenatal visit. Others focus on syphilis and HIV with additional screenings left to clinical judgment.
Florida, for example, requires practitioners to test pregnant women but also informs them of their right to refuse. Kansas requires consent before drawing the blood sample. Colorado has a specific provision for women arriving at the hospital for delivery without prior HIV testing: the hospital must notify them that testing will be performed unless they decline. These laws exist as a safety net to ensure that women who might otherwise slip through the cracks still get screened, particularly for syphilis and HIV, where the consequences of a missed diagnosis are most severe.
If you’re unsure what your state requires or what tests have already been ordered, your prenatal care provider can walk you through exactly what’s included in your lab work. You can also request additional testing at any point during pregnancy if your circumstances change.