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Synchronization Rate, Size of the Ovulatory Follicle, and Pregnancy Rate after Synchronization of Ovulation Method in Hanwoo  

박정준 (축산기술연구소)
이명식 (축산기술연구소)
박수봉 (축산기술연구소)
임석기 (축산기술연구소)
전기준 (축산기술연구소)
정영훈 (축산기술연구소)
우제석 (축산기술연구소)
나기준 (축산기술연구소)
고대환 (상지영서대학 동물자원학과)
Publication Information
Journal of Embryo Transfer / v.18, no.3, 2003 , pp. 187-193 More about this Journal
Abstract
Recently a protocol was developed that precisely synchronizes the time of ovulation in Hanwoo. Cows were treated with GnRH on Day 0, PGF$_2$$\alpha$ 7 d later, GnRH 2 d later, and then time-inseminated approximately 24 h after this second treatment with GnRH. Ovarian morphology was monitored cows by trans-rectal ultrasonography 6.5MHz linear transrectal probe(Sonovet - 600., Medison co. Korea) from 24 hr to 31 hrs after second GnRH injection. The result obtained summarized as follows - 1. Induced ovulation were 24 to 31hr after the second GnRH injection, but high induced ovulation was 28hr. 2. Conception rate with HML(High meat lin) and HIL(High milk lin) treatment were 48.1％(38/79) and 43.9％(40/91), respectively. 3. Conception rate of 1∼2 parity and 3∼4 parity was 44.3％ and 55％, respectively. 4. Conception rate of spring, autumn was more increased, 47.3％ than summer.
Keywords
GnRH; $\textrm{PGF}_{2a}$; conception rate; estrus; synchronization;
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1 Bartolome J, Hernandez J, Sheerin P, Luznar S, Kelbert D, Thatcher WW and Archbald LF. 2003. Effect of pretreatment with bovine somatotropin (bST) and/or gonadotropin-releasing hormone (GnRH) on conception rate of dairy cows with ovarian cysts subjected to synchronization of ovulation and timed insemination. Theriogenology, 59:1991-1997   DOI   ScienceOn
2 Frick PM, Guenther JM and Wiltbank MC. 1998. Efficacy of decreasing the dose of GnRH used in a protocol for synchronization of ovulation and timed ai in lactating dairy cows. Theriogenology, 50:1275-1284   DOI   ScienceOn
3 Geary TW, Whittier JC, Hallford DM and MacNeil MD. 2001. Calf removal Improves conception rates to the Ovsynch and CO-Synch protocols. J. Anim. Sci., 79(1):1-4   DOI
4 Pursley JR, Silcox RW and Wiltbank MC. 1998. Effect of time of artificial insemination on pregnancy rates, calving rates, pregnancy loss and gender ratio after synchronization of ovulation in lactating dairy cows. J. Dairy. Sci., 81:2139-2144   DOI   ScienceOn
5 Stevenson JS, Kobayashi Y and Thompson KE. 1999. Reproducive performance of dairy cows in various programmed breeding systems including ovsynch and combinations of gonagonadotropin- releasing hormone and prostaglandin F2a. J. Dairy. Sci., 82:506-515   DOI   ScienceOn
6 Lemastea JW, Yelich JV, Kempfer JR, Fullenwider JK, Barnett CL, Fanning MD and Selph JF. 2000. Effectiveness of GnRH plus prostaglandin $PGF_2a$ for estrus synchronization in cattle of Bos indicus breeding. J. Anim. Sci., 79(2): 309-16
7 Neglia G, Gasparrini B, Palo RD, Rosa CD, Zicarelli L and Campanile G. 2003. Comparison of preganancy rates with two estrus synchronization protocols in Italian Mediterranean Buffalo cows. Theriogenology, 60:125-133   DOI   ScienceOn
8 Pursley JR, Mee MO and Wilbank MC. 1995. Synchronization of ovulation in dairy cows using $PGF_2a$ and GnRH. Theriogenology, 44:915-923   DOI   ScienceOn
9 Bastidas P and Randel RD. 1987. Seasonal effects on embryo transfer results in Brahman cows. Theriogenology, 28(4):531-540   DOI   ScienceOn
10 Bartolome JA, Archbald LF, Morresey P, Hernandez J, Tran T, Kelbert D, Long K, Risco CA and Thatcher WW. 2000. Comparison of synchronization of ovulation and induction of estrus as therapeutic strategies for bovine ovarian cysts in the dairy cow. Theriogenology, 53: 815-825   DOI   ScienceOn
11 Pursley JR, Wiltbank MC, Stevenson JS, Ottobre JS, Garverick HA and Anderson LL. 1997. Pregnancy rates per artificial insemination for cows and heifers inseminated at a synchronized ovulation or synchronized estrus. J. Dairy. Sci., 80:295-300   DOI   ScienceOn
12 Murugavel K, Yaniz JL, Santolaria P, Lopez-Bojar M and Lopez-Gatius F. 2003. Luteal activity at the onset of a timed insemination protocol affects reproductive outcome in early postpartum dairy cows. Theriogenology, 60: 583-593   DOI   ScienceOn
13 Momcilovic D, Archbald LF, Walters A, Tran T, Kelbet D, Risco C and Thatcher WW. 1998. Reproductive performance of lactating dairy cows treated with gonadotrophin-releasing hormone (GnRH) and/or prostaglandin $F_2a(PGF_2a)$ for synchronization of estrus and ovulation. Theriogenology, 50:1131-1139   DOI   ScienceOn
14 Yavas Y, Johnson WH and Walton JS. 1999. Modification of follicular dynamics by exogenous FSH and progesterone, and the induction of evaluation using hCG in postpartum beef cows. Theriogenology, 52:949-963   DOI   ScienceOn
15 Shea BF, Janzen RE and McDennand DP. 1984. Seasonal variation in response to stimulation and related embryo transfer procedures in alberta over a nine year period. Theriogenology, 21(1):186-195   DOI   ScienceOn