 This study uses a prospective cluster randomized design. Twelve clinics similar in size, population, and services in Migori district, Kenya that provide ANC have been randomly assigned to receive integrated ANC, PMTCT HIV services intervention arm or non-integrated services control arm. At the intervention clinics, pregnant women will receive ANC, PMTCT and HIV care and treatment including HAART if required at the same clinic visit from the ANC provider. At the control clinics, women will receive antenatal care and PMTCT services with referral to the HIV care and treatment department located in the same facility. The control sites more closely resemble the current approach followed for care and treatment of HIV-infected pregnant women in Kenya. The content of ANC, PMTCT, and HIV care will be the same in the two study arms and will follow current Kenyan national guidelines. The only difference between the two arms will be the providerlocation of HIV care and treatment. 