1Dominic M. University of Pennsylvania Medical Center,Philadelphia, PA. Adolescent pregnancy. Review provided by VeriMed Healthcare Network. http://www.nlm.nih.gov/medlineplus/ency/article/001516.htm,2002-1-21.
2United Nations. World Population Prospects, The 2000 Revision, Volume 1: Comprehensive Tables. United Nations Publication, 2001,Sales No. E. 01. Ⅷ.8.
3Dickson R, Fullerton D, Eastwood A, et al. Preventing and reducing the adverse effects of unintended teenage pregnancy.Effective Health Care Bulletin, 1997,3(1 ): 1-12.
4The Nordic Resolution on Adolescent Sexual Health and Rights. Foreningen Sex and Samfund. http://www.sexogsamfund.dk/uk_start.htm, 2001-9-27.
5Billy JOG, Landale NS & Grady WR. Effects of sexual activity on adolescent social and psychological development.Social Psychology Quarterly, 1988, 51 ( 3): 190-212.
6Mohamed K & Masona D. Adolescent pregnancy in a prospective survey of contraceptive knowledge and reproductive behavior. Central African Journal of Medicine, 1997, 37(10):316-32.
7Charlotte P, Julie F, Peter H, et al. The determinants of sexual intercourse before age 16. J Adolesc Health, 2000, 27(2): 136-47.
8Yan P, Huntley J & Sutherland D. Estimation of the historical age-specific HIV incidence in Canada. XI International Conference on AIDS, Vancouver, July 1996.
9Poulin C. Nova Scotia Student Drug Use 1996: Technical Report. Drug Dependency Services Division, Nova Scotia Department of Health and Dalhousie University, 1996.
10World Health Organization. Progress in Reproductive Health Research, 2000, 11 .No.53.
