Preeclampsia Prevention: Assessing Pregnant Women's Knowledge of Calcium Supplementation

Introduction: Preeclampsia remains one of the leading causes of maternal and perinatal morbidity and mortality worldwide, particularly in low-resource settings. Characterized by elevated blood pressure and proteinuria after 20 weeks of gestation, preeclampsia can progress to eclampsia if not managed properly. The World Health Organization (WHO) strongly recommends calcium supplementation—1.5 to 2 grams daily starting from the second trimester—as a preventive measure, especially for pregnant women with low dietary calcium intake. However, the effectiveness of this intervention depends heavily on the level of maternal knowledge and adherence to supplementation guidelines. Given that knowledge is a critical determinant of health behavior, it is essential to evaluate the extent to which pregnant women are informed about the role of calcium in preventing preeclampsia.Materials & Methods: This study used a systematic review approach to synthesize existing evidence on maternal knowledge regarding calcium supplementation for preeclampsia prevention. A total of 22 peer-reviewed articles published between 2013 and 2024 were identified through searches of electronic databases such as PubMed, ScienceDirect, and Google Scholar. Inclusion criteria were studies focusing on pregnant women, knowledge or behavior related to calcium supplementation, and outcomes related to preeclampsia or maternal nutrition. The articles were analyzed thematically to identify key patterns, knowledge gaps, and influencing factors.Results: Findings across the reviewed studies consistently indicate that knowledge among pregnant women about calcium supplementation is generally inadequate or suboptimal, particularly in low- and middle-income countries. Many women are unaware of the correct dosage, timing, and importance of calcium in reducing the risk of preeclampsia. Knowledge levels are influenced by multiple factors, including educational attainment, exposure to antenatal counseling, access to health services, prior pregnancy experience, and the availability of educational materials. In addition, a positive correlation was found between higher levels of maternal knowledge and increased adherence to calcium supplementation. Conversely, women with limited understanding often demonstrated poor compliance and limited engagement with health promotion activities. Several studies also highlighted the role of healthcare workers in effectively communicating nutrition-related information and the impact of cultural beliefs on supplement use.Conclusions: The systematic review highlights the urgent need to strengthen maternal education programs as a key strategy in preventing preeclampsia. Improving pregnant women’s knowledge about calcium supplementation should be a central component of antenatal care services. Interventions should include clear, culturally sensitive health communication strategies delivered through both clinical settings and community outreach. Policy makers and health practitioners should prioritize training for health workers, development of accessible information materials, and integration of nutrition education into routine pregnancy care. Such efforts will support more informed maternal decision-making and contribute to reducing the incidence of preeclampsia and its associated health burdens.