Effects of prostaglandin F2 treatment on semen characteristics of crossbred rams in the non-breeding season

摘要

The aim of the present study was to evaluate?the effects of administration of?PGF2α?on semen characteristics in crossbred rams in the non-breeding season. Twenty crossbred rams (Arkhar-Merino × Moghani and Arkhar-Merino × Ghezel) were randomly allocated into two equal groups. The experimental group received 7.5 mg IM of Estroplan (PGF2α?analogue) and the control group received 1 ml of water soluble.?A total number of eighteen ejaculates per ram were collected by artificial vagina twice a week 30 min following IM administration. Semen ejaculates were?evaluated for volume, sperm concentration, total sperm output, mass and individual motility,?methylene blue reduction time-test (MBRT), percentage of live sperm and sperm abnormality rates. The results of the current study shows that PGF2α?treatment on crossbreed rams improved most semen characteristics includingvolume, sperm concentration,?total sperm output?and MBRT in comparison to control group (P