Mpreg was big in Torchwood fandom. Everyone considered it canon because some asshole writer thought it'd be funny if they threw in a line in the first episode about contraceptives in the rain and Jack jokes "At least I won't get pregnant. Never doing THAT again." Boom, mpreg canon. HATE IT. I've never seen it done even remotely well. Granted I usually won't read it but when I have it's always some burly dude crying and having mood swings and wanting cheesecake. God. Hate it.