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Symptom guide · Pregnancy Smart

HIV during pregnancy

Assigned clinical reviewerPerry Friedman· MD, FACOG-MFMDraft · pending clinical reviewUpdated

By trimester

Weeks 1–13

1st trimester

Start or continue an effective antiretroviral regimen promptly, with resistance testing and a review of hepatitis B status, prior medicines, interactions, and adherence. Do not stop an existing regimen without the HIV pregnancy team.

Weeks 14–27

2nd trimester

Viral load is checked after a regimen starts or changes, monthly until undetectable, and then at least every three months. Ongoing results guide adherence support and whether any medicine adjustment is needed.

Weeks 28–birth

3rd trimester

A viral load around 36 weeks, or within four weeks of planned birth, guides mode of birth, intrapartum zidovudine decisions, and newborn medication intensity. Feeding planning should be finalized with the HIV and pediatric teams.

What does the evidence show for HIV?

  • The March 2026 U.S. perinatal HIV guidelines advise starting antiretroviral therapy as soon as possible during pregnancy, even before resistance results return, because earlier viral suppression is associated with lower transmission risk. 1
  • U.S. guidance checks viral load at the initial visit, two to four weeks after starting or changing therapy, monthly until undetectable, at least every three months thereafter, and again near 36 weeks. 2
  • When viral load is unknown or above 1,000 copies/mL near birth, a scheduled cesarean birth at 38 weeks is recommended; cesarean birth is not advised solely for HIV when the level is 1,000 copies/mL or lower. 3
  • Every newborn with in utero or intrapartum HIV exposure should receive one or more antiretroviral medicines as close to birth as possible, preferably within six hours, with the regimen based on transmission risk. 4
  • June 2026 U.S. guidance says formula or banked donor milk eliminates feeding transmission; sustained viral suppression with therapy lowers breastfeeding transmission below 1% but not to zero, so feeding choices require shared decision-making and monitoring. 5

When should I call my provider about HIV?

A new positive or reactive HIV test and labor with unknown HIV status need same-day testing and specialist coordination because pregnancy, birth, and newborn plans are time-sensitive. Do not stop antiretroviral medicines without the HIV pregnancy team. If labor starts before the planned HIV birth plan is in place, contact the delivery unit immediately. If you are ever unsure which side of the line you are on, make the call. Obstetric teams handle these check-ins as routine, not as overreacting.

Frequently asked questions

Can HIV during pregnancy have no symptoms?

Yes. HIV during pregnancy can be silent, and symptoms of recent infection can resemble another viral illness. Testing is the only reliable way to know HIV status, which is why an HIV test is part of routine early prenatal care.

When should antiretroviral therapy begin in pregnancy?

Antiretroviral therapy should begin as soon as possible after HIV is identified in pregnancy, even while resistance results are pending. The specialist can adjust the regimen after results return and account for prior PrEP, hepatitis B, interactions, and other conditions.

Should existing HIV medicines be stopped after a positive pregnancy test?

Do not stop HIV medicines on your own after a positive pregnancy test. Most patients continue an effective regimen while the HIV pregnancy team reviews its pregnancy data, viral suppression, resistance history, interactions, and whether a carefully planned change is warranted.

How often is viral load checked during pregnancy?

HIV viral load is checked at the first antenatal visit, two to four weeks after a regimen starts or changes, monthly until undetectable, at least every three months after suppression, and near 36 weeks or within four weeks of planned birth.

Can someone with HIV have a vaginal birth?

Yes. Vaginal birth is generally appropriate when HIV viral load is 1,000 copies/mL or lower near birth and there is no separate obstetric reason for cesarean birth. The final plan uses the latest viral load and clinical circumstances.

When is cesarean birth advised for HIV?

A scheduled cesarean birth at 38 weeks is advised when HIV viral load is above 1,000 copies/mL or unknown near birth. Cesarean birth is not recommended solely for HIV when the viral load is 1,000 copies/mL or lower.

Will the baby need HIV medicine after birth?

Yes. Every newborn with pregnancy or birth exposure to HIV should receive antiretroviral medicine, preferably within six hours. Maternal viral-load history and adherence determine whether the infant receives a lower-risk prophylaxis plan or a multidrug presumptive-therapy plan.

Can a parent with HIV breastfeed in the United States?

Current U.S. guidance supports shared decision-making. Formula or banked donor milk removes feeding transmission risk. With consistent therapy and viral load below 50 copies/mL for at least three months before birth, breastfeeding can be discussed and supported with close parent and infant monitoring.

How much can HIV medicine lower transmission risk?

With antiretroviral therapy throughout pregnancy and birth, perinatal HIV transmission can be reduced to below 1%, but the risk is not zero. Early therapy, sustained viral suppression, an appropriate birth plan, and prompt newborn medication all contribute to that low risk.

Related in the library

References

  1. Initial Use of Antiretroviral Therapy During Pregnancy

    NIH ClinicalInfo · https://clinicalinfo.hiv.gov/en/guidelines/perinatal/recommendations-arv-drugs-pregnancy-initial-use-antiretroviral-therapy

  2. Initial Evaluation and Continued Monitoring of HIV During Pregnancy

    NIH ClinicalInfo · https://clinicalinfo.hiv.gov/en/guidelines/perinatal/antepartum-care-initial-evaluation-monitoring-hiv-assessments-during-pregnancy

  3. Preventing Perinatal Transmission of HIV During Pregnancy and Childbirth

    NIH HIVinfo · https://hivinfo.nih.gov/understanding-hiv/fact-sheets/preventing-perinatal-transmission-hiv-during-pregnancy-and-childbirth

  5. Preventing HIV Transmission During Infant Feeding

    NIH ClinicalInfo · https://clinicalinfo.hiv.gov/sites/g/files/mnhszr391/files/guidelines/documents/perinatal-hiv/preventing-transmission-infant-feeding-perinatal.pdf

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.