Preventing Mother-to-Child Transmission

One of the biggest advances in HIV care has been the ability to prevent HIV from passing from a parent to their baby during pregnancy, birth, or breastfeeding. With consistent treatment and monitoring, the risk of transmission can be brought down to a very small fraction of what it once was.

How Transmission Is Prevented

Preventing transmission relies on a few coordinated steps, each of which lowers the risk further:

• Taking ART consistently during pregnancy. This lowers your viral load, which is the strongest predictor of whether the virus could pass to the baby.

• Monitoring viral load close to delivery. Your care team will check your viral load as your due date approaches to help plan for a safe delivery.

• Delivery planning based on viral load. Depending on your viral load near delivery, your provider will recommend the delivery approach that offers the most protection.

• Preventive medication for the newborn. Babies born to parents with HIV typically receive a short course of medication after birth as an extra layer of protection while test results are pending.

• Infant testing. Babies are tested at scheduled points after birth to confirm their HIV status, since standard tests at birth can't yet tell the difference between the parent's antibodies and a true infection.

Feeding Decisions

Decisions about breastfeeding versus formula feeding are personal and depend on several factors, including your viral load, access to formula, and guidance from your care team. This is a conversation worth having directly with your provider, since recommendations depend on your individual situation and the most current clinical guidance.

Why Consistency Matters So Much

Each part of this process builds on the one before it. Taking ART consistently throughout pregnancy is what keeps your viral load low; a low viral load is what makes delivery and feeding decisions safer; and infant prophylaxis and testing provide additional protection and peace of mind. Skipping doses or missing appointments doesn't just affect you. It can reduce the protection this whole system is designed to provide.

If you're struggling to take your medication consistently, or if side effects, transportation, or other barriers are getting in the way, tell your care team. They would much rather help you solve that problem than have you face it alone.

Key Takeaways

• Consistent ART during pregnancy is the most important factor in preventing transmission to a baby.

• Delivery planning and infant preventive medication add extra layers of protection.

• Newborns are tested on a schedule to confirm their HIV status, since early tests can't yet distinguish infection from the parent's antibodies.

• Feeding decisions should be made together with your care team based on your specific situation.