The causal effect of a family planning intervention on women's contraceptive use and birth spacing.

Proc Natl Acad Sci U S A · 2022 · PMC9295775 · PMID 35609202

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may be significantno p-value reported

The limits to external validity may be significant, given the observed heterogeneity in the impacts of FP interventions in different settings ( 11 , 12 , 26 , 28 ).

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