Study Design: A prospective cohort study of postpartum women had an analysis performed at 6 months postpartum correlating BMD with
contraceptive use. Forearm BMD was measured 7–10 days, 3 months and 6 months postpartum. Eighty-two women were analyzed,
comparing nonhormonal (54) and progestin-only (28) contraceptive methods. Information about breastfeeding duration, amenorrhea and
body mass index was collected.