8WHO. Adolescents Productive Health, Annual Technical Re- port 2000 [ M] . World Health Organization Geneva, 2001: 87 - 94.
9William RB, Grace ED, Catherine GL, et al. West African youth initiative: outcome of a reproductive health education program [ J] . Journal of Adolescents Health, 2001, 29: 436 - 446.
10WHO. WHO technical report series 886: Programming for ad- olescent health and development - Report of WHO/UNFPA/ UNICEF. Study Group on Programming for Adolescent Health [M] .Geneva, 1999: 1-11.
