A new approach for estrus induction in Arabian mares suffering from ovarian inactivity

Twenty-six Arabian mares affected with ovarian inactivity, as monitored by the clinical examination and ultrasonographical scanning, were selected during December and January. these animals were subjected to a new protocol of sequential hormonal injections as a trial for estrus induction, progesterone (300 mg/day) was injected on days 1,4,7,10 and 14, estradiol benzoate (15mg/day) on days 6 and 9, and gnrh (0.01mg/day) on days 18, 20, and 22 of the treatment regimen. an estrus induction response of 80.77% (21/26) was observed following hormonal treatment. the onset time of post treatment was short (66.48 hours) and more synchronized. the responded group showed significant (p