ساهمت جهود سانجر على دمج المنظمتين أخيرًا عام 1939 في منظمة واحدة أطلق عليها "الاتحاد الأمريكي لتحديد النسل".NYU Margaret Sanger Papers Project "Birth Control Council of America".
Leaders of both groups viewed this as an auspicious time to merge the two organizations, so, in 1937, the Birth Control Council of America, under the leadership of Sanger, was formed to effect a consolidation.NYU Margaret Sanger Papers Project "Birth Control Council of America".