Although treatment with PGF2a did not affect the
concentration of T and E2, invariably it was associated
with a successful mount and ejaculation, which usually
was the first attempt, although occasional false mounts
were observed, with success achieved at the second
mount. Despite a wealth of data to support the linkage of
exogenous PGF2a and boar libido, the mechanism
involved remains undetermined. That PGF2a has been
Similarly, in intact boars, Fonda et al. [13] found that
PGF2a increased blood concentrations of cortisol and
prolactin, but did not significantly affect LH or
testosterone release. In contrast, we observed no effect
of PGF2a on prolactin or cortisol release.