I totally have had this problem before and I think I figured out what it is for me. I think that when I'm pg, Dh and I have sex and he doesn't pull out, (b/c I can't get pg ) And I think that the -ahem- semen have some funky reaction with my hooney and it creates this awful stink. Soooo, now that I don't let him do that in me anymore, no more stink. HTH!!!