Efficiency of methods used for estrous synchronization in indigenous Greek goats

The efficiency of estrus synchronization and reproductive performance was evaluated in 120 indigenous goats (Capra prisca) in the breeding season.Treatments were fluorogestone acetate (FGA)-impregnated sponges, FGA-impregnated sponges plus intramuscular injection of 400 IU pregnant mare serum gonadotrophin (PMSG), Double intramuscular injection of prostaglandin F2 (PGF2 ), FGA-impregnated sponges plus intramuscular injection of PGF2 , and FGA-impregnated sponges plus intramuscular injection of PGF2 and 400 IU of PMSG. Estrous response to treatment was ≥95% in all treatments. Onset of estrus and estrous duration varied significantly among treatments, whereas fertility rate, gestation length, prolificacy and birth type did not differ (P > 0.05). The use of FGA-impregnated sponges, and FGA-impregnated sponges plus intramuscular injection of 400 IU PMSG was effective in the attainment of early and compact synchronization of estrus in goats. © 2003 Elsevier B.V. All rights reserved