A Push For Purity: Are Abstinence Pledges Truly Effective?
One study found that young people who took a pledge were one-third less likely to use contraception when they did become sexually active than their peers who had not pledged, and the rates of STIs were the similar between the two groups. This may be because pledgers lacked sexual health education in general, or felt ashamed to seek medical assistance related to contraception and STI testing.
The study also found that in communities where there are a higher proportion of pledgers, overall STD rates were significantly higher than in other settings, and “male and female pledgers are six times more likely to have had oral sex than non-pledgers, and male pledgers are four times more likely to have had anal sex than those who had not pledged.”
Image source and full article: http://kinseyconfidential.org/push-purity-abstinence-pledges-effective-2/