Trends in Antenatal Laboratory Parameters in Primary Health Care Facilities in Ogbomoso North Local Government Area, Oyo State, Nigeria: A Four-Year Retrospective Review

Background: Maternal health remains a key indicator of health system performance, especially in low- and middle-income countries like Nigeria, where antenatal care (ANC) is constrained by limited diagnostic capacity and delayed clinical interventions. Integrating routine laboratory screening into ANC enhances early detection of complications and improves pregnancy outcomes. The research examines laboratory parameter patterns from pregnant women who received antenatal care services at Primary Health Care facilities in Ogbomoso North Local Government Area of Oyo State Nigeria from 2019 to 2022.