translate English to French: A conclusive answer to whether the abstinence-only approach is effective will require larger, more rigorous studies than have been conducted to date.14 One such study, which is being conducted for the U.S. Department of Health and Human Services, is a five-year evaluation of 11 abstinence-only programs.
Pour savoir quelle est l'efficacité réelle des programmes prônant l'abstinence exclusive, il faudra mener d'autres études, à la fois plus étendues et plus rigoureuses,14 comme celle entreprise par le U.S. Depart-ment of Health and Human Services (le ministère américain de la Santé).