title: Contraceptive use and breastfeeding: their inverse relationship and policy concern.
mesh_terms: D000293:Adolescent; D000328:Adult; D001942:Breast Feeding; D003268:Contraception Behavior; D003906:Developing Countries; D005260:Female; D006291:Health Policy; D006801:Humans; D009549:Nigeria; D012746:Sexual Abstinence