It's FOETUS not goddamn FETUS you swine!
The O is there for a reason! Ever hear a brit say Foetus? There's a slight, subtle sorta.. roll (?) to the sound of the "foe" part of the word. Rather than it being FEE-TUSS, which is decidedly harsh sounding, it should roll off the tongue smoothly.
Maybe I am just overly passionate about that word in particular because of my band FOETUS in a jar (and don't you dare spell it fetus in a jar)