title: Breastfeeding and the return of fertility.
mesh_terms: D001695:Biology; D002582:Cervix Mucus; D002584:Cervix Uteri; D003267:Contraception; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005835:Genitalia; D005836:Genitalia, Female; D007774:Lactation; D010827:Physiology; D011247:Pregnancy; D014566:Urogenital System; D014599:Uterus
keywords: Biology; Cervical Mucus; Cervix; Contraception; Contraceptive Effectiveness; Family Planning; Family Planning, Behavioral Methods; Genitalia; Genitalia, Female; Lactation, Prolonged; Physiology; Pregnancy; Urogenital System; Use-effectiveness; Uterus