• Title/Summary/Keyword: 임신율

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Effect of Feeding Rye Silage and Feed Restriction on both Growth and Reproductive Performances in Replacing Gilts (후보돈에서 호맥 사일리지의 급여와 사료의 제한급여가 생산성과 번식능력에 미치는 효과)

  • 조진호;한영근;민병준;진영걸;김해진;유종상;김정우;김인호
    • Journal of Animal Science and Technology
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    • v.48 no.1
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    • pp.69-76
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    • 2006

  • This study was conducted to evaluate the effects of feeding rye silage and feed restriction on both growth and reproductive performances in replacing gilts. Twenty four replacing gilts (Landrace×Yorkshire, 67.63±1.17kg initial BW) were used in 49 d growth assay. Dietary treatments were included 1) CON(basal diet), 2) S15(15% feed restriction + ad libitum rye silage) and 3) S30(30% feed restriction + ad libitum rye silage). In growth performance, average daily gain and average daily feed intake were the highest in CON among treatments(P<0.05). Average daily silage intake was not significantly different between S15 and S30 treatments(P>0.05). Feed conversion ratio was the lowest in CON among treatments(P<0.05). Average silage intake of S15 and S30 treatments was increased as time goes by(P<0.05). While all gilts of S15 and S30 treatments became pregnant, one gilt of CON became pregnant. Also, first estrus and mating were occured earlier in S15 and S30 than those of CON. In conclusion, 15% feed restriction and feeding rye silage reduced growth performance, reached earlier to first estrus and increased pregnancy rate in replacing gilts.

  • https://doi.org/10.5187/JAST.2006.48.1.069 인용 PDF KSCI

Effect of Timing of Vaccination on the Pregnancy Rate of Recipients and the Viability of Calves Derived from In Vitro Produced Hanwoo Embryos (한우 체외 수정란이 이식된 수란우에 백신 투여 시기가 임신과 송아지의 생존에 미치는 영향)

  • Park, Y.S.;Kim, S.S.;Jang, M.J.;Park, H.D.
    • Journal of Embryo Transfer
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    • v.21 no.4
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    • pp.307-313
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    • 2006

  • The present study was conducted to investigate the effects of time of vaccination in recipients on the pregnancy rate and the viability of calves derived from embryos produced in vitro. In experiment 1, control group was non-vaccinated, group 1-1 received vaccine (Pfizer, Exton, PA, USA) during 0$\sim$4 weeks and group 1-2 received vaccine during 4$\sim$8 weeks before embryo transfer. The pregnancy rates in the control (42.6%) and group 1-2 (45.3%) were significantly higher (p<0.05) than that in the group 1-1 (32.6%). However, the abortion rates were similar among groups (4.9 to 13.5%). In experiment 2, the recipients received embryos produced in vitro were non-vaccinated (control) or vaccinated. Vaccine was injected during 0$\sim$4 weeks (group 2-1) and 4$\sim$8 weeks (group 2-2) before parturition. The incidence of a disease in calves was significantly higher in the control (22.4%) than in other vaccinated groups (2.2% and 3.1%, p<0.05). The mortality of calves in the control is 27.6%, which was significantly higher than that of group 2-1 and group 2-2 (11.1% and 7.8%).

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Minimal Stimulation using rhFSH and GnRH Antagonist for IVF Treated Patients of Advanced Age (고령 불임여성의 체외수정술시 최소자극법의 효용성)

  • Kim, So-Ra;Kim, Chung-Hoon;Lee, Jin-Kyoung;Jeon, Gyun-Ho;Kim, Sung-Hoon;Chae, Hee-Dong;Kang, Byung-Moon
    • Clinical and Experimental Reproductive Medicine
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    • v.36 no.1
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    • pp.63-70
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    • 2009

  • Objective: This study was performed to investigate the effectiveness of minimal stimulation using rhFSH and GnRH antagonist compared with GnRH antagonist multidose protocol (MDP) in IVF treated patients with aged 40 and above. Methods: Seventy-five patients with aged 40 and above were equally randomized to minimal stimulation group (n=37) or GnRH antagonist MDP group (n=38). For minimal stimulation group, ultrasound monitoring was started on cycle day 7 or 8. Daily injections of 0.25 mg cetrorelix together with 150 IU rhFSH were started from the day at 13${\sim}$14 mm of a leading follicle diameter. For GnRH antagonist MDP group, daily injections of 225 IU rhFSH were initiated from cycle day 2 and GnRH antagonist was started at a dose of 0.25 mg/day on rhFSH stimulation day 6 or the day at 13${\sim}$14 mm of leading follicle diameter. In both groups, transvaginal ultrasound-guided oocyte retrieval was performed. According to cleavage and morphologic characteristics of embryos, embryos were transferred 3 to 5 days after oocyte retrieval. Results: There were no differences in patients' characteristics and cycle cancellation rate between the two groups. Total dose and duration of rhFSH used were significantly fewer and shorter in minimal stimulation group than those in GnRH antagonist MDP group. The numbers of oocytes retrieved, mature oocytes and transferred embryos were also lower in minimal stimulation group. However, there were no significant differences in the clinical pregnancy rate and miscarriage rate between the two groups. Conclusions: This study demonstrates that minimal stimulation protocol provides comparable pregnancy rates to GnRH antagonist MDP with fewer dose and days of rhFSH used, and thus can be a cost-effective alternative in women aged 40 and above.

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