STUDIES ON THE USE OF GnRH AND PROSTAGLANDIN FOR INDUCTION OF OSTRUS AND OVULATION IN OLD BARREN MARES

Document Type : Original Article

Authors

Department of surgery and theriogenology, faculty of veterinary medicine, Cairo University

Abstract

Twenty eight anoestrus Barren mares were classified according to their ovarian size into two groups. Group (A) 18 mares had small inactive ovaries and the mares were injected by 1 mg GnRH 3 times at 10 days intervals. Fifteen mares showed oestrus within 3 - 12 days after me end of treatment. These mares were mated by fertile stallion and the conception rate at induced oestrus was 60%. : Group (B), 10 anoestrus Barren mares, had big ovaries. The mares were treated by 5 mg PGF2 & single injection, mares responded to treatment and showed oestrus within 1-4 days. The conception rate at the induced oestrus was 42.8%.

Main Subjects