  We calculate the gravitino production rate, computing its one-loop thermal
self-energy. Gravitino production processes that do not result through thermal
cuts of its self-energy, have been identified and taken into account.
Correcting analytical errors and numerical approximations in the previous
calculations, we present our result. This deviates from the latest estimation
by almost 10%. More importantly, we provide a convenient formula, for
calculating the gravitino production rate and its thermal abundance, as a
function of the reheating temperature of the Universe.
