Table 2. Population, interventions, comparator, outcomes, and study design criteria for study inclusion.

Category	Inclusion criteria
Population	Pregnant women living in low- and middle-income countries
Intervention	•   Micronutrient and calcium supplementation to mother •   Balanced energy protein (i.e. food) supplementation to mother •   Deworming •   Maternal education •   Any water, sanitation and hygiene intervention
Comparators	•   Placebo •   Standard-of-care (if applicable) •   No intervention •   Any of the interventions listed above as monotherapy or in combination that can be used for indirect comparison
Outcomes	At least one of the following outcomes: •   Preterm birth (<37 weeks of gestational age) •   Low birthweight (<2500 g) •   Birthweight (continuous)
Study Design	Randomized clinical trials
Other	Published in the English language