Table 1.

Search terms by criteria

Criteria	Search terms
Country	Afghanistan OR Bangladesh OR Bhutan OR India OR Nepal OR Maldives OR Pakistan OR Sri Lanka OR Asia OR South Asia
Woman	Pregnant OR pregnant woman OR pregnant women OR pregnancy
Maternal nutrition	(maternal nutrition) OR (antenatal care) OR ANC OR vitamin A OR micronutrient OR (maternal health) OR (community health) OR (health access) OR anaemia OR anaemic OR (community health) OR (health access) OR coverage OR (nutrition counselling) OR counselling OR calcium OR iron
Study type	RCT OR (randomized controlled trial) OR (randomized controlled trial) OR (randomized control trial) OR (randomized control trial) OR (quasi randomized) OR (quasi randomized) OR (nonrandomized controlled trial) OR (nonrandomized controlled trial) OR (nonrandomized control trial) OR (nonrandomized control trial) OR (historically controlled stud*) OR (interrupted time series) OR (before and after study) OR (systematic review) OR (cohort study) OR (cross‐sectional study) OR (longitudinal study) OR (cross‐sequential study) OR (meta‐analysis) OR (literature review) OR (qualitative) OR (evaluation)

Note. MESH terms used (in PubMed): maternal nutritional physiological phenomena, prenatal care, vitamin A, maternal health, public health, health, counselling, nutritional status, randomized controlled trials.