Studies On The Ovarian Dynamic Development Pattern During The Synchronization And The Superovulation In The Crossbred Cattle With The B-mode Ultrasonic Scanner Technology

The present study observes the dynamic change of follicles and corpus luteal and follicular waves by B-mode ultrasonic scanner technology.The experiments were carried out to optimize the effect of synchronization of estrus, super-ovulation and embryo transfer, and evaluated the effect of reproduction control by different hormone treatments during the Synchronization and the superovulation of the young crossbred heifers, for a better understanding of ovarian function and controlling ovulation.In the 1 st experiment the cattle was made to induce synchronous estrus by cloprostend sodium, the effects of the synchronous estrous were compared.the significantly different was found with the B-mode ultrasonic scanner technology, results showed that: records were induced for estrous synchronization injected cloprostend sodium, 15 of the 20 were observed in estrus .the number of domination follicle is 5.07 ±1.94 in the estrus synchronization and the number were positively correlated significantly with the day of estrus cycle (r=0.73 p<0.01)of the 15 have three kind of wave .that is ,two follicle wave ,three follicle wave ,four follicle wave ,and the percentage of three follicle wave is 73.33%the percentage of two four follicle wave both are 13.33%.In the 2nd experiment we Studied on the ovarian dynamic development pattern of ovarian follicle in crossbred cattle with the B-mode ultrasonic scanner technology and analyzed effects of superovulation,and the crossbred cattle were super-ovulated with same dosage FSH-PG treatment ,from the day of super-ovulation to flushing embryo (day 7,oestrous =day 0). progesterone(P₄) and estradiol (E₂)levels in the serum of 10 cattle were studied ,it is concluded that the serum E₂ and the serum P₄ concentration at any time were quantified ,at heat the number of follicle on average is 15.50±4.31,the concentration of P₄ is 0.086+0.02ng/ml.on the day before the super-ovulation the number of large follicle is 2.80±1.23.the concentration of P₄ is 0.277+±0.03ng/ml and the concentration of E₂ is 5.02 ± 0.86pg/ml.at flushing, the number of the corpora luteal is 13.73 ±1.91 by B-mode ultrasonic, the concentration of P₄ is 0.226 ± 0.003 and the concentration of E₂ is 5.22±1.06pg/ml.the number of the corpora luteal is 7.9 + 2.85 by recta palpation.The embryos were collected from the tip of uterus on the 7^th day after estrus and mating the results indicated the successful rate of embryo collection was 100% (10/10).the average number of embryos per cattle was 4.2 + 3.16.In the 3rd experiment research achievements of the diagnosis and treatment of ovarian cysts in...