Holland–Rantos

Holland–Rantos ko sosiyatee sosaaɗo to Amerik e hitaande 1925, tawi ko daraniiɓe haɓaade jibinannde, peewnoowo leɗɗe cafrorteeɗe toowɗe. Geɗel maggel gadanel ko diyafragm, ko ɗum woni feere nde Margaret Sanger wasiyii ngam haɗde jibinde. Sosiyetee oo ina sooda kadi jeli ɓuuɓɗi e innde « jeli vaginal », tuugiiɗo e foormula ummoriiɗo Almaañ. E kitaale 1940, Hollande–Rantos soodaa ko e fedde wiyeteende Young’s Rubber Co. Hedde hitaande 2000, sosiyatee keso biyeteeɗo HR Pharmaceuticals sosaa, yeeyoowo jelli ɓuuɓɗi e innde "HR Jelly".

 TeskorɗeTone, Andrea (2002). Devices and Desires: A History of Contraceptives in America, Hill and Wang, pp 127–128.* Tone, Andrea, "A Medical Fit for Contraceptives", in Women, Science, and Technology: a Reader in Feminist Science Studies, Taylor & Francis, 2008, pp 166–179.