  We accurately approximate the contribution of a Yukawa-coupled fermion to the
inflaton effective potential for inflationary geometries with a general first
slow roll parameter $\epsilon(t)$. For $\epsilon = 0$ our final result agrees
with the famous computation of Candelas and Raine done long ago on de Sitter
background, and both computations degenerate to the result of Coleman and
Weinberg in the flat space limit. Our result contains a small part that depends
nonlocally on the inflationary geometry. Even in the numerically larger local
part, very little of the $\epsilon$ dependence takes the form of Ricci scalars.
We discuss the implications of these corrections for inflation.
