title: New research on breast-feeding as a method of fertility regulation.
mesh_terms: D000568:Amenorrhea; D001721:Birth Intervals; D001942:Breast Feeding; D005193:Family Planning Services; D006262:Health; D007227:Infant Nutritional Physiological Phenomena; D009747:Nutritional Physiological Phenomena; D049590:Postpartum Period; D012098:Reproduction
keywords: Birth Spacing; Breast Feeding; Family Planning; Health; Infant Nutrition; Nutrition; Postpartum Amenorrhea; Puerperium; Reproduction