BackgroundBangladesh is urbanizing rapidly, facing challenges of malnutrition, low coverage and poor quality of urban nutrition services. ObjectivesWe assessed the effect of integrating maternal, infant, and young child nutrition interventions, delivered at urban Maternal Neonatal and Child Health facilities, on maternal dietary diversity, iron and folic acid (IFA) and calcium consumption, and child feeding practices. MethodsWe used a quasi-experimental design with a nonrandom assignment of 20 health care facilities in Dhaka to intensive and standard service arms. We conducted facility-based observations and community-based surveys at baseline (2020) and endline (2022) (n = 2455 observations and surveys with 1678 pregnant women [PW] or recently delivered women [RDW] at endline). We derived difference-in-difference (DID) estimates, adjusted for characteristics that differed at baseline or endline, and accounted for clustering. ResultsExposure to antenatal care (ANC) was similar in both arms: two-thirds of RDW received ANC during the first trimester and three-fourths received ≥4 ANC checkups. Compared to the standard arm, a higher proportion of PW in the intensive arm received counseling on dietary diversity (DID: 45 percentage points [pp]), and a higher proportion of RDW received IFA (25 pp) and calcium supplementation (19 pp), showed adequate weight gain (44 pp), and recorded appropriate child feeding (27 pp). Improvements were greater in the intensive than the standard arm for the number of food groups consumed (DID: 1.1 food groups) and minimum dietary diversity (23 pp); no effect was observed for IFA and calcium consumption during pregnancy. However, effects were observed for early initiation of (20 pp) and exclusive breastfeeding (45 pp), introduction of solid or semisolid foods (28 pp), and egg and/or flesh food consumption (33 pp) among children. Minimum dietary diversity and acceptable diet remained low in both arms. ConclusionsIntensifying nutrition in government-aligned health care services delivered by experienced nongovernmental organization-run facilities is a feasible model to address the urban health gap, nutrition services coverage, and improve practices.The trial was registered at clinicaltrials.gov as NCT03882268.