Journal of Embryo Transfer (한국수정란이식학회지)

The Korean Society of Embryo Transfer (한국수정란이식학회)
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Investigation of Feline Ovulation Time after LH Surge Induced by hCG Injection in Superovulation

  • Jeon, Kyo-Hee (College of Veterinary Medicine, Chungnam National University) ;
  • Kim, Seung-Hwan (College of Veterinary Medicine, Chungnam National University) ;
  • Lee, Jin-Goo (College of Veterinary Medicine, Chungnam National University) ;
  • Kim, Ghang-Yong (College of Veterinary Medicine, Chungnam National University) ;
  • Oh, Seung-Kyu (College of Veterinary Medicine, Chungnam National University) ;
  • Malaweera, Don Buddika Oshadi (College of Veterinary Medicine, Chungnam National University) ;
  • Ramachandra, Sisitha (College of Veterinary Medicine, Chungnam National University) ;
  • Yoon, Ki-Young (Department of Companion Animal, Shingu College) ;
  • Shin, Sang-Tae (College of Veterinary Medicine, Chungnam National University) ;
  • Cho, Jong-Ki (College of Veterinary Medicine, Chungnam National University)
  • Received : 2014.05.01
  • Accepted : 2014.06.20
  • Published : 2014.06.30
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Abstract

Feline ovulation time after LH surge have not been defined because its LH surge is occurred by several times of coital vaginal induction and cat has relatively longer time between LH surge and ovulation compared with other mammalian species. This study was performed to investigate the feline ovulation time after LH surge that was induced by hCG injection for superovulation with PMSG. For superovulation, all cats were received an initial injection of PMSG (200 IU, i.m.) followed 80 hrs later with an injection of hCG (200 IU, i.m.). And then, sampling of both ovaries was surgically performed at each 6 different times (10, 18, 22, 26, 29, and 32 hrs) after hCG injection. Cumulus-oocyte-complexes (COCs) were collected from 2 sides of oviducts and ovaries were fixed for ovarian histology. Total 38 COCs were collected only at hCG 32 hrs and no COCs were shown at earlier 5 times. However, in the ovarian histology, corpus haemorrhagicum or corpus luteum was not shown in all groups including ovary at hCG 32 hrs that COCs were collected. In conclusion, it was suggested that feline ovulation was occurred at 29~32 hrs after LH surge and taken relatively long time for CL formation after ovulation.

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References

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