Comparison 1. Any psychosocial intervention vs. control: neonatal outcomes.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Preterm birth (< 37 weeks gestation)	3	264	Risk Ratio (M‐H, Random, 95% CI)	0.71 [0.34, 1.51]
2 Positive neonatal toxicology at delivery (any drug)	1	89	Risk Ratio (M‐H, Random, 95% CI)	1.91 [0.86, 4.24]
3 Low birth weight (< 2500 g)	1	160	Risk Ratio (M‐H, Random, 95% CI)	0.72 [0.36, 1.43]
4 Days hospitalized after delivery	2	103	Mean Difference (IV, Random, 95% CI)	‐1.27 [‐2.52, ‐0.03]