The authors performed a prospective study of 100 consecutive cases of mammary hypertrophy. Sixty were treated by McKissock's technique and forty by Thorek's technique. The patients were reviewed at the second and sixth postoperative months. A general study of the population was performed to specific their demand, which was functional in 90% of cases, and the various symptoms were quantified. 74% of cases presented with psychological problems and a desire for aesthetic improvement was expressed by 67% of cases. Postoperatively, a functional improvement was obtained in 99% of cases, while psychological disorders resolved in 100% of cases. The satisfaction rate was very high: 79% of patients were very satisfied and 20% were satisfied. Some defects observed by the patients or surgical team are analysed. The complications observed, always minor, are reported. Breast reduction provides an unquestionable benefit for patients with mammary hypertrophy. Two simple and perfectly defined techniques were used to treat all these cases with a maximal satisfaction rate and a minimal complication rate.