Caird, L E Oral progestogen-only contraception may protect against loss of bone mass in breast-feeding women. [electronic resource] - Clinical endocrinology Dec 1994 - 739-45 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0300-0664 Standard No.: 10.1111/j.1365-2265.1994.tb02788.x doi Subjects--Topical Terms: AdultAlkaline Phosphatase--bloodBone Density--drug effectsBottle FeedingEstradiol--bloodFemaleHumansLactation--metabolismLevonorgestrel--administration & dosageLongitudinal StudiesNorethindrone--administration & dosageOsteocalcin--bloodProgesterone Congeners--administration & dosageProlactin--blood