title: Estimating the effect on unwanted fertility of a postpartum recruitment strategy.
mesh_terms: D000293:Adolescent; D000328:Adult; D003201:Computers; D003267:Contraception; D003710:Demography; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008954:Models, Biological; D049590:Postpartum Period; D011247:Pregnancy; D011275:Pregnancy, Unwanted