EFFECT OF DIFFERENT PREPARATIONS OF FOLLICLE STIMULATING HORMONE (FSH) ON THE SUPEROVULATORY RESPONSE IN MEAT SHEEP OF FOREIGN SELECTION DURING NON-BREEDING SEASON

Abstract

The article presents the results of studying the reaction of meat sheep of
Charolais and Ile-de-France breeds to superovulation with two preparations of follicle stimulating hormone (FSH). Fourteen adult ewes were used in the experiment, including Charolais
(n = 8) and Ile de France (n = 6). Within each breed, sheep were randomly divided in equal
numbers into two groups, resulting in 4 groups. Sheep from group 1 (Charolais, n=4) and
group 3 (Ile de France, n=3) were subjected to a superovulation scheme with the use of drug
Folltropin-V (total dose of 220 mg per animal, 7 injections). Sheep from group 2 (Charolais,
n=4) and group 4 (Ile de France, n=3) were subjected to a superovulation scheme using FSHP (total of 280 IU per animal, 6 injections). The experimental results show that the number of
corpora lutea was significantly higher in ewes, which received Folltropin-V than in ewes,
which received FSH-P (P<0.01). Groups 1 and 3 had a higher number of retrieved embryos
and embryos suitable for transfer than groups 2 and 4. In conclusion, in Charolais and Ile de
France meat sheep, application of 220 mg of Folltropin-V (7 injections) is a more effective
scheme for the induction of multiple ovulation than FSH-P.