We defined HIV-1-uninfected
women and male partners of HIV-1-infected women
as ‘pregnancy exposed’ during the period between LMP
and 6 weeks following the end of pregnancy, thus
including the early postpartum period as pregnancyexposed time; inclusion of the early postpartum period is
consistent with other studies of pregnancy as a risk factor
for HIV-1 acquisition and reflects physiologic changes of
pregnancy that persist in the early postpartum period