Eligibility criteria and recruitment
HIV infection
HIV INFECTION
Pregnant women presenting to one of the study sites with a confirmed HIV diagnosis (either previously known or diagnosed that day) were referred to a research assistant to assess their study eligibility. Pregnant women with confirmed HIV infection and access to a mobile phone who could text message or had someone who could do so on their behalf were eligible for enrolment. Participants were required to be 18 years of age or older, willing to be followed-up for 24 months after delivery, and resident of the PMTCT clinic catchment area with no plans to relocate outside the area during follow-up. Only women attending one of the clinics for their first ANC visit in their current pregnancy were included. The average gestational age at first presentation to ANC is approximately 5 months in KenyaThe trial protocol