The objective of this study was to demonstrate that the teaching strategy in pairs on the use of contraceptive methods is more effective than the guidance and the traditional counseling in the prevention of pregnancies in teenagers from Acomayo, district of Chinchao, department of Huánuco, in 2012. A study with two groups (experimental and control) with 42 teenagers each was done, who responded: the interview, scale, evaluation sheet and the questionnaire, previously validated. The contrast of hypothesis was using t Student for independent samples and the Chi Square of homogeneity, with p≤ 0.05, supported by PASW V19.0. Knowledge and attitudes on sexual and reproductive health were compared yielding significant differences of 3.6 points, [t= 5.323; p= 0.000] and 11.9 [t= 5.760; p= 0.000] respectively; admitting that knowledge and attitudes in the experimental group were higher than th...