Attitudes, Beliefs, and Predictors of Gestational Weight Gain and Postpartum Weight Retention in South Africa: A Mixed Methods Analysis.

Suboptimal gestational weight gain (GWG) is associated with pregnancy complications and postpartum weight retention (PPWR). Little data exists about GWG and PPWR attitudes and beliefs in low-and-middle-income countries (LMICs) to inform interventions. We examined GWG and PPWR attitudes, beliefs, and intentions among pregnant people, with and without HIV, in Cape Town, South Africa. Pregnant persons were enrolled between 2019 and 2022 (N = 400). Study visits were conducted at 24-28 weeks' and 33-38 weeks' gestation. Rate of GWG (kg/week) between the second and third trimesters was estimated and reported as below, above, or within the 2009 Institute of Medicine guidelines. Multivariable-multinomial regression estimated predictors of GWG. In-depth interviews among pregnant participants, community leaders and healthcare providers informed GWG attitudes, beliefs, and perceptions. Over 90% of participants experienced suboptimal rates of GWG (35% below and 47% above guidelines) during pregnancy. Living with HIV [OR 0.50, 95% CI (0.26-0.95)] was protective against GWG rate above guidelines compared to those without HIV. Being 25-29 years old was associated with GWG rate below guidelines [OR 0.28 95% CI (0.08-0.95)]. Little concordance occurred between intended and true GWG. Despite GWG category, two-thirds of participants felt it was 'very important' to monitor GWG while 44% viewed losing weight gained during pregnancy as "not important". Barriers to meeting GWG goals included lack of access to healthy foods, exercise opportunities, and education. Given rising obesity in women of reproductive age in LMIC, locally-adapted interventions are needed during pregnancy and postpartum to aide in healthy GWG and improve maternal-child health outcomes.