Retrieved 12 October 2011.</ref> وعلى الرغم من استمرار سانجر كقائدة للمنظمة، فإنها لم تعد تمارس النفوذ نفسه الذي كانت تحظى به في بداية ظهور حركة تحديد النسل، Date of merger recorded as 1938 (not 1939) in: O'Connor, Karen (2010), "Gender and Women's Leadership: A Reference Handbook", p. 743.
Retrieved 12 October 2011.</ref> The effort eventually led to the merger of the two organizations in 1939 as the Birth Control Federation of America (BCFA).Date of merger recorded as 1938 (not 1939) in: O'Connor, Karen (2010), "Gender and Women's Leadership: A Reference Handbook", p. 743.