Transvaginal ultrasound-guided ovum pick-up in cattle I. Effects of estrus cycle, season and bST treatment on ovum pick-up in cattle |
Byeong-chun Lee1, Ki-young Yoon1, Hyun-il Kim2, Sang-ho Roh1, Kang-nam Lee1, Woo-suk Hwang1 |
1College of Veterinary Medicine, Seoul National University 2Cheil Chem. Co. |
초음파유도에 의한 소 난포란의 채취에 관한 연구 I. 발정주기, 계절 및 bST처치 영향에 관하여 |
이병천1, 윤기영1, 김현일2, 노상호1, 이강남1, 황우석1 |
1서울대학교 수의과대학 2제일화학 |
|
Abstract |
Estrus cycle of cow, season and follicldar stimulating treatment, having an effect on the number of follicle, are investigated for the oocyte recovery rate in ovum pick-up(OPU). The number of follicle aspirated and oocyte collected on the different days of estrus cycle(D 4~5, D 9~10 and D 14~15) were not significantly different among the groups. The higher number of viable oocytes were produced on Jan-May(79.0%) than Jun-Aug(33.3%) by OPU in cow. The number of follicle and aspirated oocyte in cows treated FSH or PMSG combined with bovine somatotropin(bST) were 1.2~1.5 times higher than in cows treated alone follicular stimulating hormone(FSH) or pregnant mare serum gonadotropin(PMSG). In conclusion, OPU can be repeatedly practiced 2 or 3 times in an estrus cycle. In addition, the high environmental temperature is not good for ovarian function of cow and the bST co-treatment with FSH or PMSG is increasing the number of aspiratable follicle. |
Key Words:
ovum pick-up, bovine somatotropin, bovine, embryo |
|