REPRODUCTIVE RESPONSE AT ILE DE FRANCE EWES AFTER 5 DAYS PROGESTAGEN TREATMENT PLUS OR WITHOUT PREGNANT MARE SERUM GONADOTROPIN (PMSG)

The aim of the present study was to study the reproductive response at Ile de France ewes after 5 days progestagen treatment plus or without pregnant mare serum gonadotropin (PMSG). The experiment was carrired out with 26 multiparous ewes. Three experimental groups were formed depending on whether a PMSG was used or not, as well as the time of treatment with a synthetic analogue of PGF 2 alpha (before or after the removal of sponges). Group 1 (PGF /Pg/PMSG) (n=8) - at the time of the placement of the sponges, the ewes were treated with a synthetic analogue of PGF 2 alpha. At the time of the sponge removal. 300 0.1 PMSG was put i.m. Group 2 (PGF/Pg) (n=9) - at the time of the placement of the sponges. the ewes were treated with a synthetic analogue of PGF 2 alpha. Group 3 - (Pg/ PGF) (n=9) - the ewes were treated with a synthetic analogue of PGF 2 alpha at the time of the sponge removal The protocol, that consisted PMSG, successfully synchronized estrus (100%) with high levels of fertility (87.5%) and fecundity (171.4%). Protocols, which were without PMSG. were not suitable for ES, because of unsatisfactory results. that were obtained.