| Tartalmi leírás: |
SUMMARY
The authors review the different methods which were ever used for pharmacological
and non-pharmacological methods to modify the reproduction in a non-pregnant
mare. These methods are influenced both by the seasonally polyoestrus and by
the drugs but a few drugs are available on the market and much fewer licenced
for horses in Hungarian condition. Based on these factors the key points of the
reproduction are: the shortening the duration of the vernal transition period and
hastening the first ovulation, induction/synchronisation of the oestrus in the
cycling mares, induction of the ovulation in the cycling mares, suppression of
oestrus, suppression of the inappropriate lactation and induction of the lactation. To shorten the vernal transition period is the most time- and cost efficient
method – instead of the different pharmacological treatments – is an artificial
lighting program. The most common therapies for induction/synchronisation of
the oestrus in the cycling mares are the prostaglandins. A practical technique for
induction of the timed ovulation is to administer human chorio-gonadotropin and
anticipate ovulation about 36 hours later. There are many non-pharmacological
alternative methods for suppression of behavioural oestrus but the feeding of
altrenogest is the most useful and effective method. Pretreatment of the mares
with oestradiol before initiation of dopamine antagonist administration increases
prolactin secretion for induction of lactation in a nurse mare. Although there is
no information about pharmacokinetics and description of the oral bromocriptine
use in horses, being a therapeutic option for inappropriate lactation treatment
in mares, it was effective.
|
