Contraception
Volume 81, Issue 3 , Pages 209-214, March 2010

Effects of the contraceptive patch and the vaginal ring on bone metabolism and bone mineral density: a prospective, controlled, randomized study

Department of Gynecology and Obstetrics, University of Naples “Federico II”, 80131 Naples, Italy

Received 11 March 2009; received in revised form 21 September 2009; accepted 23 September 2009. published online 30 October 2009.

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PII: S0010-7824(09)00421-1

doi:10.1016/j.contraception.2009.09.011

Contraception
Volume 81, Issue 3 , Pages 209-214, March 2010