Integrating Calcium Supplementation into Facility-Based Antenatal Care Services in Western Kenya: A Qualitative Process Evaluation to Identify Implementation Barriers and Facilitators.

Although integrating calcium into antenatal iron-folic acid supplementation was generally acceptable to ANC providers, pregnant women, and their families, calcium supplementation presents unique challenges that must be considered to successfully implement these guidelines.This trial was registered at clinicaltrials.gov as NCT02238704.