Norethisterone acetate in the treatment of colorectal endometriosis: a pilot study. Posted on 10 October 200914 February 2020 by admin Ferrero S, Camerini G, Ragni N, Venturini PL, Biscaldi E, Remorgida V. Norethisterone acetate in the treatment of colorectal endometriosis: a pilot study. Hum Reprod 2010;25:94-100.https://academic.oup.com/humrep/article/25/1/94/696811