In a stud farm situation, we have observed latency to erection and ejaculation of up to 120 minutes when breeding hobbled oestrous mares (Tibary et al, 2005). In addition to behavioural differences that may affect fertility results, size discrepancy may be another constraint in stallion/ mare breeding. | In a stud farm situation, we have observed latency to erection and ejaculation of up to 120 minutes when breeding hobbled oestrous mares (Tibary et al, 2005). In addition to behavioural differences that may affect fertility results, size discrepancy may be another constraint in stallion/ mare breeding. |