1Mosher WD, Martinez GM, Chandra A, et al. Use of contraception and use of family planning services in the United States: 1982-2002. Adv Data, 2004, 350(1): 1-36.
3Cheng Y, Gno X, Li Y, et al. Repeat induced abortions and contraceptive practices among unmarried young women seeking an abortion in China. Inter J Gynecol Obstet, 2004, 87(2): 199-202.
4Kost K, Singh S, Vaughan B, et al. Estimates of contraceptive failure from the 2002 national survey of family growth. Contraception, 2008, 77(1):10-21.
5Clark LR. Will the pill make me sterile? Addressing reproductive health concerns and strategies to improve adherence to hormonal contraceptive regimens in adolescent girls. J Pediatr Adolesc Gynecol, 2001, 14(4): 153-62.
6Whitaker AK, Johnson LM, Harwood B, et al. Adolescent and young adult women's knowledge of and attitudes toward the intrauterine device. Contraception, 2008, 78 (3):211-7.
7Whitaker AK, Dude AM, Neustadt A, et al. Correlates of use of long-acting reversible methods of contraception among adolescent and young adult women. Contraception, 201 O, 81(4):299-303.
8Gilliam ML, Neustadt A, Kozloski M, et al, Adherence and acceptability of the contraceptive ring compared with the pill among students: a randomized controlled trial. Obstet Gynecol, 2010, 115(3):503-10.
9Suhonen S, Haukkamaa M, Jakobsson T, et al. Clinical performance of a levonorgestrel-releasing intrauterine system and oral contraceptives in young nulliparous women: a comparative study. Contraception, 2004, 69 (5):407-12.
10Brockmeyer A, Kishen M, Webb A. Experience of IUD/ IUS insertions and clinical performance in nulliparous women-a pilot study. Eur J Contracept Reprod Health Care, 2008, 13(3):248-54.
