2Diaz A, Laufer MR, Breech LL. Menstruation in girls and adolescents: using the menstrual cycle as a vital sign [J] . Pediatrics, 2006, 18 (5) : 2245.
3Matytsina LA, Zoloto EV, Sinenko LV et al. Dysfunctional uterine bleeding in adolescents: concepts of pathophysiology and management [J] . Prim Care, 2006, 33 (2) : 503.
2Alan Guttmacher Institute. Sharing Responsibility: Women, Society & Abortion Worldwide. New York: The Alan Guttmacher Institute, 1999,250.
3Eduardo Lara-Torre, MDI and Sari L. Kives, MD2. J Pediatr Adolesc Gynecol,2005,18:133 - 135.
4Dan Apter, Raisa Cacciatore. Elina Hermanson International. Adolescent contraception Congress Series,2004,81 - 89.
5GrunseitA, Kippax S, Aggleton P, et al. Seexuality education and young people's sexuabehavior: A review of studies. J Adolesc Res, 1997,12(4) :421 - 453.