Effects of a low-dose and ultra-low-dose combined oral contraceptive use on bone turnover and bone mineral density in young fertile women: a prospective controlled randomized study.
Contraception. 2003 May;67(5):355-9. doi: 10.1016/s0010-7824(03)00025-8.
Contraception. 2003.
PMID: 12742557
Clinical Trial.