Wiktionary
female-to-male
a. 1 (&lit female to male English) 2 change or having changed (via gender reassignment surgery) from being physically female to being male. 3 change or having changed from having a female gender (gender identity or presentation) to being male. 4 (context electronics of an adapter English) That changes a female end (usually a socket) of a connection into a male one (with pins, usually a plug).
Usage examples of "female-to-male".
Despite the female-to-male ratio, Stratos is no adolescent's moist fantasy come true, but a complex society, filled with contradictions, dangers, subtleties I've not begun to plumb.