The Prevention Agent Pregnancy Exposure Registry, also known as EMBRACE (Evaluation of Maternal and Baby Outcome Registry After Chemoprophylactic Exposure) is a prospective observational cohort investigation of exposures to study agents under investigation for HIV prevention. The study population will consist of female participants who are identified as becoming pregnant during their participation in a microbicide or PrEP trial, or who have had planned exposures in pregnancy safety studies as well as their babies resulting from these pregnancies. This study will only enroll babies who have not yet reached their 1 year birth date.