Thesis (Ph.D.) - Cairo University - Faculty of Veterinary Medicine - Department of Theriogenology

The present study aimed to use color and spectral Doppler ultrasound to study both follicular, luteal blood flow vascularization areas and ovarian and uterine arteries Doppler indices after single and multiple ovulations and after induction of ovulation using either Ovsynch or CIDR evaluated. Nitric oxide and ovarian hormones were estimated in blood serum. Results of the non-induced ovulation showed that both days and phases of the oestrus cycle influenced (P=0.0001) the follicular dynamic, the luteal dynamic, the ovarian and uterine hemodynamic. The ovulatory wave and the mid-luteal non-ovulatory wave had expanding numbers and the diameters of small, medium and large follicles. Though area, antral area, vascularization area of the (ovulatory folcile) OF ascended from day -4 to the day of ovulation (day 0), but the percent of the vascularization area and the granulose layer increased till day -3. The CL diameter and luteal vascularization area increased till day 13, and 15, but luteal % of vascularization area ascended (P=0.0001) from days 1 to 4 and declined from days 9 to 13. Both (resistance index)RI and(pulstility index) PI of the ipsilateral ovarian artery were lower than the contralateral one, but both obtained high values during the follicular phase

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