Maternal SAEs during intervention period (enrollment to 9 mo post partum), number resulting in ARV substitution, and proportion of women initiated on ARV who required substitution.

aEach participant only reported once for primary reason for ARV substitution between enrollment and 9-mo post partum.bIncludes one participant where SAE attributed to ZDV, but stopped all ARVs.cIncludes two participants who stopped both NVP and ZDV.dIncludes one participant who stopped both NVP and ZDV.DVT, deep venous thrombosis.