Abstract:
Ovarian cysts, estimated as
the most frequent ovarian disorder in
dairy cattle, can impact the economic
aspect and trigger serious loss by
affecting the reproductive performance.
However, treatment strategies for ovarian
cysts in dairy cattle are disputed, as some
researchers favour the use of
gonadotropin-releasing hormone (GnRH)
for all cysts, whereas others recommend
this treatment only for follicular cysts,
with prostaglandin F2α (PGF2α) for luteal
cysts, but not all of the dairy cattle
responded to these regimes. Other studies
mention a spontaneous recovery for some
of the dairy cattle that present this
disorder. However, the Ovsynch protocol
appears to be the most used for treating
ovarian follicular cysts, despite low
pregnancy rates. Thus, this study’s main
purpose is to assess by analogy the
reproductive efficiency of multiparous
dairy cattle with follicular cysts after
treatment with a recommended dose of
GnRH or a further Ovsynch protocol, and
of cattle with luteal cysts after PGF2α or a
further 12-day Presynch protocol, by
comparing the reproductive responses
between treated and non-treated cattle. It
is remarkable that ten of the dairy cattle
diagnosed with ovarian cysts recovered
spontaneously without any hormonal
intervention, but the reproductive
performance indicates that treatment
should be started as soon as the condition
is diagnosed. Compared with other studies,
our approach improved the conception
(82.4% and 64.3%, respectively) and
pregnancy rates (53.8% and 50%,
respectively) in both follicular and luteal
cysts.
