Infections in pregnancy can be silent, but they should never be ignored. Some infections may affect only the mother, while others can pass to the baby during pregnancy, delivery or breastfeeding. HIV, syphilis and hepatitis B are among the most important infections screened during antenatal care because early testing can change the outcome for both mother and child.
On 8 September 2026, PAHO reported that Trinidad and Tobago completed a national assessment to move closer to WHO certification for eliminating mother-to-child transmission of HIV, syphilis and hepatitis B. The assessment reviewed antenatal screening, treatment, laboratory quality, surveillance, maternity care and follow-up of exposed infants, then produced a national action plan for the next certification steps.
This is not only a country-level public health update. It is a practical reminder for every family planning pregnancy, already pregnant or caring for a newborn: the right infection tests at the right time can prevent lifelong complications. WHO’s triple elimination initiative focuses on testing for HIV, syphilis and hepatitis B in antenatal care, prompt treatment for women who test positive, safe delivery, infant follow-up and ongoing care where needed.
Why infections in pregnancy need early testing
Many people expect infection to cause fever, pain, discharge, ulcers or jaundice. In pregnancy, that assumption can be dangerous. HIV may not cause obvious symptoms for years. Syphilis can become latent, meaning it stays in the body without visible signs. Hepatitis B may affect the liver silently while still creating a transmission risk for the baby.
CDC recommends that pregnant women be tested for HIV, hepatitis B, hepatitis C and syphilis during each pregnancy, because screening is the first step toward treatment and prevention of perinatal transmission. CDC also notes that early screening opportunities are often missed, especially when prenatal care starts late.
The most important message is simple: a negative test gives reassurance, and a positive test gives time. Time allows doctors to confirm the diagnosis, start treatment, protect the newborn and arrange follow-up.
What mother-to-child transmission means
Mother-to-child transmission means an infection passes from a pregnant woman to her baby before birth, during delivery or after birth through breastfeeding, depending on the infection. The medical term often used is vertical transmission.
WHO uses the term validation when a country has met the required criteria showing that mother-to-child transmission has been reduced to a level where it is no longer considered a public health threat. This does not mean every infection has disappeared. It means the health system has strong screening, treatment, surveillance and infant follow-up systems that can prevent most avoidable cases.
For families, the lesson is direct: elimination begins with one pregnant woman being tested early and followed properly.
The three key tests every pregnancy should not miss
| Infection | Main pregnancy test | Why it matters for the baby | What doctors do if positive |
|---|---|---|---|
| HIV | HIV antigen or antibody test, sometimes rapid testing | HIV can pass during pregnancy, birth or breastfeeding if not managed | Confirm the result, start or continue antiretroviral therapy, monitor viral load and plan infant care |
| Syphilis | RPR or VDRL with confirmatory treponemal testing, depending on local protocol | Untreated syphilis can cause miscarriage, stillbirth, preterm birth or congenital infection | Treat promptly with pregnancy-appropriate penicillin therapy and evaluate the partner |
| Hepatitis B | HBsAg blood test | Hepatitis B can pass at birth and may become chronic in infants | Check viral load, plan newborn vaccination and HBIG where indicated, and consider antiviral prophylaxis in selected high viral load cases |
WHO guidance states that all pregnant women should be tested for HIV, syphilis and hepatitis B surface antigen at least once and as early as possible in pregnancy. WHO also recommends tenofovir prophylaxis from the 28th week of pregnancy until at least birth for HBsAg-positive pregnant women with HBV DNA of at least 200,000 IU/mL, in addition to infant hepatitis B vaccination.
When should pregnancy infection testing be done?
Testing should ideally happen at the first antenatal visit. The earlier the result is known, the more time there is to protect the mother and baby. WHO recommends testing for HIV, syphilis and hepatitis B as early as possible in pregnancy, and CDC recommends HIV, syphilis and HBV screening at the first prenatal visit.
| Stage of pregnancy | What should be checked | Why this timing matters |
|---|---|---|
| First prenatal visit | HIV, syphilis and hepatitis B screening | Detects hidden infection early and gives time for treatment |
| Third trimester | Repeat testing when risk, local policy or high community rates apply | Detects infection acquired after the first test |
| Delivery admission | Testing if previous results are missing, risk is high or symptoms suggest infection | Helps the delivery team protect the newborn immediately |
| After birth | Follow-up for exposed infants | Confirms the baby receives the correct vaccine, medicine, testing and monitoring |
CDC recommends third trimester retesting for syphilis in certain risk groups at around 28 weeks, HIV retesting before 36 weeks in certain risk groups, and delivery testing when previous screening was not done or when risk factors are present.
HIV in pregnancy
HIV can be managed very effectively during pregnancy when it is diagnosed early. The goal is to protect the mother’s health, reduce the viral load and lower the risk of transmission to the baby.
NIH perinatal HIV guidance recommends that antiretroviral therapy should be started as early as possible in pregnancy if it is not already being used. If treatment is already working, tolerated and safe, it is usually continued, with the goal of maintaining viral suppression to undetectable levels.
A positive HIV test during pregnancy is not a reason for panic. It is a reason for urgent specialist care, viral load monitoring, medication review, delivery planning, infant prophylaxis and clear breastfeeding guidance according to local medical protocols.
Syphilis in pregnancy
Syphilis is one of the most important infections to detect early because treatment during pregnancy can protect the baby. The danger is that syphilis may be hidden. A pregnant woman may have no ulcer, rash or pain and still test positive.
WHO reports that untreated maternal syphilis can cause severe adverse pregnancy outcomes, including fetal death, stillbirth, neonatal death, preterm birth, low birth weight and congenital syphilis. WHO also notes that adequate benzathine penicillin treatment early in pregnancy greatly reduces fetal risk.
Partners should also be evaluated and treated when needed. If the mother is treated but the partner remains untreated, reinfection can occur during the same pregnancy.
Hepatitis B in pregnancy
Hepatitis B is a liver infection that can pass from mother to baby, especially around birth. The main screening test is HBsAg. If HBsAg is positive, the next steps usually include liver function testing, HBV DNA viral load, specialist review and a written plan for newborn protection.
WHO recommends hepatitis B birth dose vaccination within 24 hours as part of prevention, followed by completion of the infant vaccine series. WHO also recommends tenofovir prophylaxis in selected pregnant women with high HBV DNA from the 28th week of pregnancy until at least birth.
In babies born to mothers who are hepatitis B positive or whose status is unknown, CDC states that the newborn should receive hepatitis B vaccine and hepatitis B immune globulin shortly after birth, within 12 hours. CDC’s current U.S. guidance uses shared decision-making for the birth dose when the mother tests negative, while the American Academy of Pediatrics continues to recommend universal hepatitis B vaccination for all infants beginning within 24 hours of birth. Local schedules may therefore differ, but exposed babies need immediate protection.
Why one negative test may not always be enough
A negative result early in pregnancy is reassuring, but it does not protect against a new exposure later. Repeat testing may be needed if there is a new sexual partner, partner infection, sexually transmitted infection during pregnancy, injection drug exposure, symptoms of acute infection or living in an area with high community rates.
CDC notes that pregnant women at higher risk may need repeat HIV and syphilis testing later in pregnancy, and syphilis testing at delivery is important when risk persists or earlier screening was not documented.
This is why doctors often ask personal questions during antenatal visits. These questions are not meant to judge the patient. They are meant to prevent missed infections and protect the baby.
What if a test comes positive?
A positive screening test should be handled quickly, calmly and confidentially. It does not automatically mean the baby is infected. It means the medical team must confirm the result, assess the stage or viral load where relevant, begin treatment and plan delivery and newborn care.
| Positive result | Immediate next step | Baby protection plan |
|---|---|---|
| HIV positive | Confirm test, check viral load, start or optimize ART | Infant prophylaxis, newborn testing and feeding guidance |
| Syphilis positive | Confirm diagnosis, stage infection and treat promptly | Assess risk of congenital syphilis and plan newborn evaluation |
| HBsAg positive | Check HBV DNA and liver status | Hepatitis B vaccine, HBIG when indicated and post-vaccine testing |
Azhali, Setiabudi and Alam studied a triple elimination program in Bandung, Indonesia, and found that screening coverage improved, but treatment gaps remained. In 2020, only 59.5% of HIV-positive pregnant women received antiretroviral therapy and only 25% of syphilis-positive cases received benzathine penicillin G, showing that testing alone is not enough unless positive mothers are linked to treatment and follow-up.
Ayurvedic and integrative support during pregnancy
From an Ayurvedic clinical viewpoint, pregnancy care should protect maternal strength, digestion, nourishment, emotional stability and fetal development. Classical Garbhini Paricharya is described in Ayurvedic texts such as Charaka Samhita, Sharira Sthana, Chapter 8, and Ashtanga Hridaya, Sharira Sthana, Chapter 1, where pregnancy care is approached through gentle, stage-wise support.
In infections in pregnancy, Ayurveda’s strongest role is supportive and individualized care alongside timely obstetric and infectious disease management. The practical focus should be on appetite, sleep, bowel regularity, anemia correction, liver-friendly diet, stress reduction and recovery strength. Any herb, bhasma, rasaushadhi, strong detoxification therapy or self-prescribed formulation during pregnancy should be used only after careful clinical review, because pregnancy requires extra safety.
This section should remain supportive rather than promotional. The article will look more credible to Western readers if HIV, syphilis and hepatitis B are treated as time-sensitive medical conditions while Ayurveda is positioned as carefully supervised maternal support.
Questions pregnant women should ask their doctor
| Question | Why it matters |
|---|---|
| Have I been tested for HIV, syphilis and hepatitis B in this pregnancy? | Confirms that the essential tests were not missed |
| Do I need repeat testing in the third trimester? | Helps detect new exposure after the first test |
| If hepatitis B is positive, what is my HBV DNA level? | Helps decide whether antiviral prophylaxis may be needed |
| If HIV is positive, is my viral load undetectable? | Guides pregnancy, delivery and infant protection planning |
| If syphilis is positive, has my partner been tested and treated? | Prevents reinfection during pregnancy |
| Does the delivery hospital have my results? | Ensures the newborn receives immediate care if needed |
| What follow-up tests does my baby need after birth? | Prevents missed infant monitoring |
When to seek urgent medical advice
A pregnant woman should seek medical advice quickly if she has a new STI diagnosis, a partner diagnosed with HIV, syphilis or hepatitis B, genital ulcers, unexplained rash, fever after possible exposure, jaundice, dark urine, severe fatigue, right upper abdominal pain, reduced fetal movements or no prenatal infection testing documented before delivery.
A pregnant woman arriving in labor without documented HIV, syphilis or hepatitis B results should tell the maternity team immediately. Rapid testing and newborn protection steps may still be possible.
Frequently asked questions
Can HIV, syphilis or hepatitis B pass from mother to baby?
Yes. These infections can pass from mother to baby during pregnancy, delivery or, in the case of HIV, breastfeeding depending on treatment and local guidance. Early testing and treatment greatly reduce the risk.
When should infections in pregnancy be tested?
HIV, syphilis and hepatitis B should be tested as early as possible in pregnancy, preferably at the first antenatal visit. Repeat testing may be advised later if risk continues, local policy requires it or earlier results are missing.
Does a positive test mean the baby is infected?
No. A positive maternal test means the pregnancy needs a clear medical plan. Many babies can be protected when the mother receives timely treatment and the newborn receives the correct follow-up.
Can syphilis be treated during pregnancy?
Yes. WHO recommends benzathine penicillin regimens for syphilis in pregnancy, with the exact schedule depending on whether infection is early, late or of unknown duration. Early treatment gives the best protection to the baby.
What happens if hepatitis B is positive during pregnancy?
The doctor usually checks HBV DNA, liver status and the delivery plan. Some women with high HBV DNA may need tenofovir from the 28th week of pregnancy, and exposed newborns need timely hepatitis B vaccination and HBIG where indicated.
Should the partner be tested?
Yes. Partner testing is important for HIV, syphilis and hepatitis B. If a partner remains untreated or unvaccinated where needed, reinfection or ongoing exposure can occur.
References
- Pan American Health Organization. (2026, September 8). One step closer to elimination: PAHO supports Trinidad and Tobago in eliminating mother to child transmission of HIV, syphilis and hepatitis B. PAHO/WHO. Used for: Trinidad and Tobago news hook and assessment details. (Pan American Health Organization)
- World Health Organization. (n.d.). Elimination of mother-to-child transmission of HIV, syphilis and hepatitis B. Used for: WHO triple elimination services and integrated antenatal care model. (World Health Organization)
- World Health Organization. (n.d.). Validation of elimination of mother-to-child transmission of HIV, syphilis and hepatitis B. Used for: explanation of WHO validation and public health meaning of elimination. (World Health Organization)
- World Health Organization. (2024, March 1). Introducing a framework for implementing triple elimination of mother-to-child transmission of HIV, syphilis and hepatitis B virus: Policy brief. Used for: four-pillar triple elimination implementation model. (World Health Organization)
- Centers for Disease Control and Prevention. (2024, January 25). Screening and testing for HIV, viral hepatitis, STD and tuberculosis in pregnancy. Used for: first prenatal visit testing and repeat testing timeline. (CDC)
- HHS Panel on Treatment of HIV During Pregnancy and Prevention of Perinatal Transmission. (2026). Recommendations for the use of antiretroviral drugs during pregnancy and interventions to reduce perinatal HIV transmission. National Institutes of Health. Used for: ART timing, viral suppression and HIV pregnancy care. (Clinical Info)
- World Health Organization. (2017). WHO guideline on syphilis screening and treatment for pregnant women. Used for: syphilis screening and treatment guidance in pregnancy. (World Health Organization)
- World Health Organization. (n.d.). Mother-to-child transmission of syphilis. Used for: congenital syphilis risks, global burden and benefit of early benzathine penicillin treatment. (World Health Organization)
- World Health Organization. (2020). Prevention of mother-to-child transmission of hepatitis B virus: Guidelines on antiviral prophylaxis in pregnancy. Used for: HBV DNA threshold and tenofovir prophylaxis from 28 weeks in selected cases. (NCBI)
- Azhali, B. A., Setiabudi, D., & Alam, A. (2023). Evaluating the impact of triple elimination program for mother-to-child transmission of HIV, syphilis, and hepatitis B in Indonesia. Narra J, 3(3), e405. Used for: research evidence showing that screening gains must be matched by treatment linkage and monitoring. (narraj.org)
