وسُجل معدل فعالية وسط المستخدمين بلغ نسبة 99.5 في المائة، في الحالات التي استخدمت فيها الطريقة بغرض تفادي الحمل.
These five continued to use the Method once the rules they broke were pointed out to them. There was a 99.5% user effectiveness rate when the intention was to avoid pregnancy.