yeah… i'm SURE that's what they were thinking 600 yrs ago when the word came into common use…
fetus | ˈfēdəs | (British (in nontechnical use) also foetus)
noun (plural fetuses)
an unborn offspring of a mammal,in particular an unborn human baby more than eight weeks after conception.
ORIGIN
late Middle English: from Latin fetus ‘pregnancy, childbirth, offspring’.
USAGE
The spelling foetus has no etymological basis but is recorded from the 16th century and until recently was the standard British spelling in both technical and nontechnical use. In technical usage, fetus is now the standard spelling throughout the English-speaking world.