In general, pregnane derivatives (progesterone, dydrogesterone, 17α-hydroxyprogesterone caproate, medroxyprogesterone acetate, megestrol acetate, etc.) do not virilize even in high dose; testosterone derivatives (ethisterone) and 19-nortestosterone (norethisterone, norethisterone acetate, etc.) generally virilize, but there are exceptions (e.g. norethynodrel) that do not.