Preventing Mother-to-Child Transmission of HIV
When a pregnant HIV-infected woman receives good medical care early and takes antiviral medications regularly during her pregnancy, the chance that she will pass HIV to her unborn baby is dramatically reduced.
It is important that any pregnant woman who knows she is HIV-positive start prenatal care as soon as possible to take full advantage of such treatments. The sooner a mother receives treatment, the greater the likelihood her baby will not get HIV.
An HIV-infected mother can receive medical treatment:
- before the birth of her baby: antiviral treatments given to the mother in the third trimester can help prevent HIV transmission to the baby
- at the time of birth: antiviral medications can be given to both the mother and the newborn child to lower the risk of HIV transmission that can occur during the birth process (which exposes the newborn to the mother’s blood and fluids); in addition, the mother will be encouraged to formula-feed rather than breastfeed because HIV can be transmitted to her baby through breast milk
- during breastfeeding: because breastfeeding is discouraged among HIV-infected mothers, this type of transmission is rare in the United States. However, in places in the world where formula is not readily available, both the mother and child can be treated with medication to lower the risk of the HIV infection to the breastfeeding child.
In the past, before antiviral medicines were routinely given, almost 25% of children born to HIV-infected mothers developed the disease and died by 24 months of age. Recent studies have shown that mothers with HIV or AIDS who get good prenatal care and regularly take antiviral drugs during their pregnancy now have less than a 5% chance of passing HIV to their babies. If these babies do get the HIV virus, they tend to be born with a lower viral load (less HIV virus is present in their bodies) and have a better chance of long-term, disease-free survival.