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Acquisition of HIV among pregnant women has widespread public health implications. Despite improved maternal and child health outcomes including preventing mother-to-child HIV transmission (MTCT), it remains an area of concern. This article describes the demographics, HIV prevalence and related risk behaviours among females aged 15-54 years, who reported being pregnant at the interview. Data were extracted from four South Africa National HIV Prevalence, Incidence, Behaviour and Communication Surveys dated 2005, 2008, 2012 and 2017. The sample sizes were n= 4954, n= 3046, n= 7022 and n= 9874, respectively. The analysis showed that pregnancy declined over time from 5.3% to 3.9%. Most pregnancies occurred among Black Africans and Coloureds, single women, youth aged 15-19 years (2005-7.5%; 2008-16.2%), those with a minimum of secondary school level education (2012-7.8%; 2017 …