title: The effects of a progestin-only oral contraceptive (levonorgestrel 0.03 mg) on breast-feeding.
abstract: This study was a non-randomized clinical trial which compared the breast-feeding experience of 250 Argentine women taking levonorgestrel 0.03 mg daily (begun one week after delivery) with that of 250 women using non-hormonal contraceptives. Weight gain of unsupplemented infants, the most important of the several criteria used to assess breast-feeding performance, was similar for the two contraceptive groups. Levonorgestrel users began supplementary feeding of their infants significantly later than did non-hormonal users; levonorgestrel users were also somewhat less likely to discontinue breast-feeding during the study period. The two contraceptive groups were similar with regard to several other measures of breast-feeding performance: growth of all infants (regardless of supplementation), patterns of contraceptive discontinuation, mothers' subjective impressions of breast-milk sufficiency, and comparison of supplementation initiation with previous experience.
authors.affiliation: Department of Epidemiology, School of Public Health, University of North Carolina, Chapel Hill.
authors.forename: M F
authors.initials: MF
authors.lastname: McCann
authors.forename: A V
authors.initials: AV
authors.lastname: Moggia
authors.forename: J E
authors.initials: JE
authors.lastname: Higgins
authors.forename: M
authors.initials: M
authors.lastname: Potts
authors.forename: C
authors.initials: C
authors.lastname: Becker
mesh_terms: D000328:Adult; D002986:Clinical Trials as Topic; D005260:Female; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D007774:Lactation / Q000187:drug effects*; D016912:Levonorgestrel; D009644:Norgestrel / Q000494:pharmacology*; D011247:Pregnancy
chemical_list: D009644:Norgestrel; D016912:Levonorgestrel