Purpose of review-There is an unprecedented global commitment to reverse the pediatric HIV epidemic by making prevention of mother-to-child transmission (MTCT) services accessible in all countries. This review outlines the successes made and the challenges that remain.Recent Findings-In resource-rich countries, MTCT rates of HIV as low as 1% has been achieved. The efficacy of short course antiretrovirals (ARVs) for the prevention of MTCT (PMTCT) in Africa is estimated at 50%. Co-infections with herpes simplex virus type 2 (HSV-2), other sexually transmitted infections resulting in genital ulcers, and endemic infectious diseases (e.g., malaria) may increase the risk of MTCT of HIV. Vertical transmission of drug-resistant viruses has been reported; the prevalence and effect of transmitted resistant virus on treatment outcomes are under investigation. Obstacles facing PMTCT in resources-limited countries include lack of health care infrastructure, limited manpower, and competing public health priorities with the limited health care budget.Summary-While the birth of an HIV-infected child in a resource-rich country is now a sentinel health event, in most resource-limited countries the birth of an HIV-infected child continues to be the status quo. Comprehensive PMTCT including ARV treatment for HIV-infected women and HIVinfected children should be paramount in resource-limited countries.