The current study entails the data obtained from ultrasonography investigation of the reproductive statuses of ewe (n=232) and does (n=164) admitted to Meet Kenana, Veterinary Clinic, Tukh, Qalyubia governorate aiming to declare the contributing factors (species, season, body weight and age) impact their fertility. Pregnancy examination revealed higher rate of singleton pregnancy in ewes, while multiple pregnancy was higher in does. A higher incidence
of pregnancy was recorded during winter season (46.74%; 86/184), but lower pregnancy rate was recorded during summer season (5.98%; 11/184). In cyclic animals, a high incidence of follicular phase was recorded during spring season (43.22%), while luteal phase was high in winter (68.18%). On the other hand, in non-pregnant animals diagnosed to have inactive ovaries, higher incidence was recorded in ewe (10.34%; 24/232;) than does (6.70%; 11/164). On the other hand, uterine disorders at high incidence were recorded in in does (9.75%; 16/164) than ewe (6.46%; 15/232). Summer season was associated with high rate of inactive ovaries (62.85%), while spring season was accompanied with high incidence of uterine disorders (70.96). Ewes at 60-70 kg body weight and 4-5 years old, and does at 40-50 kg body weight
and 2-3 years old showed an improved reproductive index (cyclicity and pregnancy rates). From the present study it could be concluded that the ultrasound is a promising diagnostic tool helps in improving the reproductive management of small ruminants through verifying the pregnant status, selection of fertile cyclic animals before breeding, and discarding the protracted infertile cases. |
