استجابة الأبقار الشامية للإباضة الفائقة و إنتاج الأجنة

الملخص EN

Eleven Shami cows available in Dier-Al-Hajar Station were used to study the superovulatory response and evaluate fertilization rate and embryo quality.

All cows received a randomly intravaginal progesterone device(CIDR) for seven days and were treated intramuscularly with different amounts of FSH (group1:400mg and group2: 200mg).

Prostaglandin F2α and GnRH were given 12 and 36 h before and after CIDR removal, respectively.

Cows were inseminated at 12 and 24 h after the GnRH injection.

Seven days later, non-surgical embryo collection was performed.

Results showed that the percentage of ovulation rate was significantly (p < 0.05) lower in the high FSH group (70.6±3.6%) than in the low FSH group (80.3±1.5%).

However, the number of fertilized ova, fertilized ova rate, the number of transferable embryos did not differ between the high and low FSH groups.

In conclusion, Shami cows response like the other breeds to superovulation regimen.

Decreasing FSH to 50% did not negatively affect studied parameters but reduced the costs of treatment.