Study design
The PrIMA study was a cRCT evaluating two models of PrEP delivery among pregnant women attending MCH clinics (Clinical Trials.gov #NCT03070600). The study protocol has been described [MCH clinics were eligible for inclusion if they had >350 HIV‐negative annual ANC clients and offered postnatal care. Study facilities were selected in collaboration with the County Ministry of Health (MoH) to ensure geographic distribution. Assuming a coefficient of variation (