Herpes and Pregnancy in India: HSV Risk, Acyclovir and Delivery

• Herpes is very common and usually silent — 8 to 25 percent of Indian adults carry HSV-2 and most never know it.
• Risk to the baby depends on timing: a brand-new (primary) infection late in pregnancy is high-risk, while recurrent herpes you had before pregnancy carries only about 1 to 3 percent risk.
• Acyclovir is safe in pregnancy; taken daily from 36 weeks it cuts outbreaks and viral shedding at delivery, lowering the chance you will need a cesarean.
• A cesarean is recommended only if you have active sores or warning tingling at the start of labour, or a first-ever infection within 6 weeks of delivery — not just because you have herpes.
• Even with no visible sores, herpes can shed silently, so condoms matter if your partner does not have the virus.
• Breastfeeding is safe — herpes is not passed through breast milk.

Herpes simplex virus comes in two types. HSV-1 is the one most people think of as cold sores around the mouth, usually caught in childhood from a kiss or a shared spoon — and roughly 60 to 90 percent of Indian adults carry it. It increasingly causes genital herpes too, through oral-genital contact. HSV-2 is the classic cause of genital herpes and is found in about 8 to 25 percent of Indian adults, with higher rates in women than men.

Once you catch either virus, it never fully leaves — it settles quietly in nerve roots and can reactivate from time to time. This is why there is no cure, only effective management. Importantly, most people with HSV-2 have no idea they have it, because outbreaks can be mild, mistaken for something else, or completely absent.

In pregnancy, the single most important question is not whether you have herpes but when you caught it. If you already had the virus before conceiving, your body has antibodies that cross the placenta and shield your baby. If you catch it for the first time late in pregnancy, those protective antibodies have not yet formed — and that is the higher-risk situation your doctor watches for. Genital sores can sometimes be confused with other causes of soreness, so it is worth knowing the range of reasons for vaginal and vulval discomfort.

• Tingling, burning or itching at the site a day or two before sores appear (the 'prodrome')
• Painful blisters that break into open sores, then crust over, on the vulva, vagina, cervix or surrounding skin
• Multiple sores on both sides, often more widespread
• Tender, swollen glands in the groin
• Flu-like feelings — fever, headache, body aches
• Stinging or pain on passing urine, sometimes severe

Recurrences happen when the dormant virus reactivates. They are usually far gentler than the first episode and tend to settle within 5 to 7 days. You may notice a familiar tingle or itch in the same small area, followed by a cluster of sores on one side, with little or no fever.

How often recurrences happen varies enormously from person to person — some have a few a year, others almost none. They are most frequent in the first year after infection and tend to fade over time. Common triggers include stress, illness, periods, friction and being run-down, so the same calming routines that help your overall pregnancy — rest, hydration and managing stress and fatigue — can also reduce flare-ups.

One quiet but crucial point: even when you have no sores at all, the virus can still shed from the skin on roughly 10 to 30 percent of days, especially in the first year. This 'asymptomatic shedding' is exactly why suppressive medicine and condoms still matter even when you feel completely fine.

• Recurrent herpes with no sores at delivery: less than 1 percent risk — especially low if you have taken suppressive acyclovir from 36 weeks.
• Recurrent herpes with active sores at delivery: about 1 to 3 percent.
• A first-ever (primary) infection in the last weeks of pregnancy: much higher, around 30 to 50 percent, because your baby has no inherited antibodies yet.

Neonatal herpes is rare but serious, which is why the whole point of pregnancy care is to prevent it. In India it is estimated at roughly 1 in 30,000 to 1 in 60,000 births. Most cases happen when a baby passes through a birth canal with active virus, which is why delivery planning is the heart of management.

A newborn who does become infected may show skin blisters, eye redness or mouth sores in the first weeks, or signs like poor feeding, unusual sleepiness, fever or temperature swings. These are treated urgently with intravenous acyclovir in a neonatal intensive care unit (NICU), and starting treatment early — on suspicion, before tests come back — saves lives. A NICU course can be costly (often several lakh rupees depending on complications), though schemes like PMJAY and state programmes cover part of it. This is exactly why prevention through good antenatal care matters so much. If your baby ever shows worrying signs after birth, our guide on when a newborn's fever needs urgent attention explains the danger signs to act on.

If you have visible sores, your doctor can often recognise herpes by its typical clustered blisters and tenderness. But because the diagnosis affects how you deliver, a lab test is used to confirm it when it matters.

When sores are present, a swab sent for HSV PCR is the gold standard — it is highly accurate, tells HSV-1 from HSV-2, and is increasingly available at major Indian labs for roughly ₹1,500 to ₹4,000.

Blood (serology) testing looks for HSV antibodies and helps answer a different question: is this a brand-new infection or one you have had for a while? Type-specific HSV IgG testing costs around ₹500 to ₹4,000 depending on the panel. A positive IgG means established (lower-risk) infection; a negative IgG with a positive sore swab points to a recent, higher-risk primary infection.

India, like the UK and US, does not routinely screen every pregnant woman's blood for herpes, because a positive result in someone with no symptoms is hard to act on and can cause needless worry. Targeted testing is reserved for women with a suspected first outbreak in pregnancy, those whose partner is known to have herpes, and women with HIV. Your antenatal tests can feel overwhelming — our plain-language guide to making sense of scans, labs and reports can help you read them with confidence.

If you have genital herpes, taking acyclovir daily from 36 weeks until delivery is one of the most valuable things you can do. It is recommended by RCOG, ACOG, FOGSI, BASHH and the CDC, and the evidence behind it is strong.

Late pregnancy tends to bring more frequent outbreaks. Suppressive acyclovir quietens this down — research shows it reduces outbreaks at delivery by around three-quarters and silent viral shedding by roughly 90 percent, which in turn lowers the chance you will need a cesarean for herpes.

The usual regimen is acyclovir 400 mg three times a day from 36 weeks until you deliver; valacyclovir 500 mg twice daily is an alternative. Acyclovir is well-studied and reassuring in pregnancy — large registries of thousands of pregnancies show no increase in birth defects. In India it is sold as Zovirax and many generics such as Acivir, costing roughly ₹100 to ₹400 for the whole course. Side effects are usually mild (occasional nausea or headache), and staying well-hydrated is sensible. Like other recommended steps that protect both mother and baby in pregnancy, this is a small, safe intervention with a big payoff. An active outbreak earlier in pregnancy is treated with the same medicine for 5 to 10 days, then switched to the daily suppressive dose at 36 weeks.

• You have active herpes sores at the onset of labour or when your waters break.
• You have prodromal symptoms (the tell-tale tingling or burning) suggesting an outbreak is starting.
• You had a first-ever genital herpes infection within about 6 weeks of your due date, even with no sores now.

Most women with herpes can give birth vaginally. A vaginal delivery is appropriate if you have established recurrent herpes with no active sores and no warning tingling when labour starts — especially if you have been on suppressive acyclovir from 36 weeks. The same is true if your only sign of herpes is a positive antibody test with no history of outbreaks.

At the start of labour, your doctor will take a careful history and gently examine your vulva, vagina and surrounding skin for any sores. If everything is clear, you can labour normally. Thanks to widespread suppressive therapy, the number of cesareans done purely for herpes has dropped substantially. If you are weighing up your birth options more broadly, you may also want to read about vaginal birth after a previous cesarean (VBAC) and what shapes an epidural decision in Indian hospitals.

After birth, your baby is watched for any signs of infection, and breastfeeding is encouraged — herpes is not carried in breast milk. The only exception is the rare case of a herpes sore directly on the breast, in which case feed from the other side and ask your doctor; our guide to comfortable breastfeeding positions can help you find a latch that avoids the affected area.

• Use condoms for every sexual encounter, including oral sex, throughout pregnancy.
• Avoid sex during any outbreak or when prodromal tingling starts.
• Ask whether your partner should take daily suppressive acyclovir, which roughly halves transmission risk.
• Consider abstaining from sex in the third trimester if your partner has frequent outbreaks.
• Talk openly — disclosure lets both of you make informed, shared decisions.

Herpes and HIV influence each other, so women living with both need a little extra coordination. HSV-2 ulcers can make HIV easier to transmit, and HIV can make herpes outbreaks more frequent and severe. Pregnant women with both viruses usually benefit from suppressive acyclovir (sometimes started earlier than 36 weeks), close monitoring, and joint care between their obstetrician and HIV team.

In India, NACO's Antiretroviral Therapy (ART) centres provide HIV care for pregnant women alongside the PMTCT (Prevention of Mother-to-Child Transmission) programme, and herpes management is folded in as needed. Decisions about delivery consider both infections together. If this applies to you, our dedicated guide to HIV, safe conception, PMTCT and your rights in pregnancy goes into much more detail. Confidentiality and respectful, stigma-free care are part of good practice — and you are entitled to both.

A herpes diagnosis in pregnancy often lands harder emotionally than it deserves to medically. Shock, shame, worry about the baby, and anxiety about the relationship are all common — and completely understandable. But it helps to hold on to the facts: herpes is extremely common, usually silent, does not shorten your life, and is very manageable. Modern pregnancy care has been refined precisely to keep babies safe, and future pregnancies are entirely possible with the same approach.

If the diagnosis raises difficult questions about your partner, give yourself time and consider talking it through together. NACO STI clinics offer free, confidential counselling, and FOGSI antenatal care increasingly includes supportive conversations about sexual health. Looking after your mind matters as much as your body here — and if vulval pain or repeated soreness is wearing you down, our guide to speaking up about vaginal pain with your doctor can help you advocate for yourself. Reducing internalised stigma does not just help you feel better; it encourages others to seek testing without fear.

• New genital sores, blisters or ulcers for the first time during pregnancy.
• An outbreak or tingling/burning warning symptoms as you approach your due date or go into labour.
• A herpes sore on your breast while breastfeeding.
• Severe pain, difficulty passing urine, high fever or feeling very unwell with an outbreak.
• In your newborn: blisters, eye redness, poor feeding, unusual drowsiness, fever or temperature instability — treat these as urgent.

• RCOG/BASHH — Management of Genital Herpes in Pregnancy (Green-top Guideline)
• ACOG — Management of Genital Herpes in Pregnancy (Clinical Practice Guideline)
• CDC — Genital Herpes (STI Treatment Guidelines)
• World Health Organization — Herpes simplex virus (Fact Sheet)
• NHS — Genital Herpes
• National AIDS Control Organisation (NACO), India — STI/RTI Services