(Last updated 8/25/2015; last reviewed 8/25/2015)
Mother-to-child transmission of HIV is the spread of HIV from an HIV-infected woman to her child during pregnancy, childbirth (also called labor and delivery), or breastfeeding (through breast milk). Mother-to-child transmission of HIV is also called perinatal transmission of HIV.
Mother-to-child transmission is the most common way that children become infected with HIV.
Yes. The risk of mother-to-child transmission of HIV is low when:
The Centers for Disease Control and Prevention (CDC) recommends that all pregnant women get tested for HIV as early as possible during each pregnancy.
Pregnant women who test HIV positive receive HIV medicines to reduce the risk of mother-to-child transmission of HIV and to protect their own health. (HIV medicines are recommended for everyone infected with HIV. HIV medicines help people with HIV live longer, healthier lives and reduce the risk of sexual transmission of HIV.)
HIV medicines reduce the amount of HIV in the body. Having less HIV in the body reduces a woman's risk of passing HIV to her child during pregnancy and childbirth. Having less HIV in the body also protects the woman's health.
Some of the HIV medicine passes from the pregnant woman to her unborn baby across the placenta (also called the afterbirth). This transfer of HIV medicine protects the baby from HIV infection, especially during a vaginal delivery when the baby passes through the birth canal and is exposed to any HIV in the mother’s blood or other fluids. In some situations, a woman with HIV may have a cesarean delivery (sometimes called a C-section) to reduce the risk of mother-to-child transmission of HIV during delivery.
Babies born to women with HIV receive HIV medicine for 6 weeks after birth. The HIV medicine reduces the risk of infection from any HIV that may have entered a baby’s body during childbirth.
Pregnant women with HIV can safely use many HIV medicines during pregnancy to prevent mother-to-child transmission of HIV and to protect their own health. Health care providers carefully consider the benefits and the risks of HIV medicines when recommending HIV medicines to use during pregnancy.
The following factors are considered when choosing HIV medicines to use during pregnancy:
Because HIV can be transmitted in breast milk, HIV-infected women in the United States should not breastfeed their babies. In the United States, baby formula is a safe and healthy alternative to breast milk.
There are reports of children becoming infected with HIV by eating food that was previously chewed by a person infected with HIV. To be safe, babies should not be fed pre-chewed food.
Read the following AIDSinfo fact sheets: