Because subsequent pregnancy in teen parents often worsens the impact of adolescent parenting; therefore, a common goal of teenage parent programs has been to reduce repeat pregnancy. To examine the impact of this goal, a meta-analysis was conducted on 16 control-comparison group studies that evaluated the effect of teenage pregnancy and parenting programs on pregnancy rates. At the first follow-up period at which programs assessed outcome (average 19.13 months), interventions produced a 50% reduction in the odds of pregnancy compared to comparison-control conditions, but by second follow-up (average 31 mos.), the effect had dissipated. Moderator analyses were also performed. Implications are that secondary pregnancy prevention programs are effective in reducing teenage pregnancy--at least at 19 months following the intervention--although there is little to recommend "comprehensive" approaches to programming over others. (Contains 8 tables and 2 figures.)