Should a Mother With HIV Breastfeed Her Baby?
Nov. 16, 1999 (Atlanta) -- The risk of passing HIV infection along to a
newborn through mother's milk is greatest in the early months of breastfeeding,
according to a study in a recent issue of the Journal of the American
In the U.S., breastfeeding is not recommended for new mothers infected with
HIV, which can spread to the baby through the mother's milk. But the study's
findings are likely to have a strong impact on international recommendations
for limiting the spread of the disease." In the U.S., specific
recommendations for HIV-infected women are not to breastfeed," researcher
Paolo Miotti, MD, tells WebMD. "So the [study findings] are much more
important for developing countries, where breastfeeding is almost
universal." Miotti is a medical officer, division of AIDS, National
Institute of Allergy and Infectious Diseases (NIAID), Bethesda, Md.
In 1998, the Joint United Nations Programme on HIV/AIDS issued a revised
statement suggesting 1) that women be offered HIV testing and counseling, 2)
that they be notified of the benefits and risks of breastfeeding if the mother
is HIV-infected, and 3) that they make a decision [about breastfeeding] based
on individual and family situations.
The reported study was done to provide further information about
breastfeeding timing vs. the risk of infant HIV infection. "We found that
the risk [of HIV transmission through breastfeeding] was more in the first six
months of the life of the baby than later on," Miotti says. "[But]
babies can catch HIV through breast milk as long as they are
The three-year study was conducted at a postnatal hospital clinic in Malawi,
a country in southern Africa where it's estimated that 30% of nursing women are
infected with HIV.
The researchers studied 672 infants -- HIV-negative at birth -- born to
HIV-infected women who had not been treated with antiretroviral (anti-HIV)
drugs during or after pregnancy. The frequency of occurrence, timing, and risk
factors of HIV transmission through breast milk were measured until the infants
were 2 years old.
While breastfeeding, 7% (47) of the infants became infected with HIV; after
breastfeeding stopped among the mothers in the study, there were no additional
new infections. "It's believed that breastfeeding roughly doubles the
number of HIV-infected babies," says Miotti.
The researchers also found that new mothers who already had a number of
children and/or who were somewhat older than the other mothers studied had a
lower risk of transmitting HIV to their newborns through breastfeeding --
possibly due to their greater previous breastfeeding experience. The
researchers write that the study probably underestimated the postnatal HIV
transmission rate, because their measurements did not include infections
contracted during the early days and weeks of breastfeeding, when infection
rates can be very high.