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Estimation of Gestational Age by Measurement of Deep Portion of Telencephalic Vesicle in Pekingese Fetus

  • Park, Jun-Tae (College of Veterinary Medicine, Chonnam National University) ;
  • Park, Chul-Ho (College of Veterinary Medicine, Chonnam National University) ;
  • Oh, Ki-Seok (College of Veterinary Medicine, Chonnam National University) ;
  • Son, Chang-Ho (College of Veterinary Medicine, Chonnam National University)
  • Received : 2014.12.08
  • Accepted : 2014.12.17
  • Published : 2014.12.31

Abstract

This study was performed to establish a new parameter for estimating gestational age and predicting parturition day by ultrasonographic measurement of deep portion of telencephalic vesicle (DPTV) diameter in small dogs. Fetal head diameter (HD) and DPTV diameter were measured in 15 pregnant Pekingese bitches, from Day 15 to the parturition day, and evaluated the correlation between gestational age. HD was measured from day 29 of pregnancy to parturition day and increased from $4.9{\pm}2mm$ to $25.5{\pm}0.7mm$. Especially, from day 38 of pregnancy to parturition day, HD uniformly increased about 0.6 mm per day and was significantly and linearly relative to gestational age during this period ($r^2$ >0.99). DPTV diameter was measured from day 35 to day 60 of pregnancy and increased from $3.2{\pm}0.9mm$ to $11.5{\pm}0.7mm$. Especially from day 38 to day 60 of pregnancy, DPTV diameter uniformly increased about 1 mm per 3 days and was significantly and linearly relative to gestational age during this period ($r^2$ >0.99). In conclusion, DPTV diameter could to be a useful parameter for the estimation of gestational age and the prediction of parturition day when used alone or in combination with HD during the second half of pregnancy.

Keywords

References

  1. Beccaglia M and Luvoni GC. 2004. Ultrasonographic study during pregnancy of the growth of an encephalic portion in the canine foetus. Vet. Res. Commun. 28:161-164. https://doi.org/10.1023/B:VERC.0000045396.64881.a9
  2. Beccaglia M, Faustini M and Luvoni GC. 2008. Ultrasonographic study of diencephalo-telencephalic vesicle for the determination gestational age of the canine foetus. Reprod. Dom. Anim. 42:367-370.
  3. Boyd JS, Renton JP and Harvey MHA. 1993. Problems associated with ultrasonography of the canine ovary around the time of ovulation. J. Reprod. Fert(Suppl). 47:101-105.
  4. England GCW and Allen EW. 1990. Studies on canine pregnancy using B-mode ultrasound. Development of the conceptus and determination of gestational age. J. Small Anim. Pract. 31:324-329. https://doi.org/10.1111/j.1748-5827.1990.tb00821.x
  5. England GCW and Allen EW. 1992. Studies on canine pregnancy using B-mode ultrasound. Diagnosis of early pregnancy and the number of conceptus. J. Small Anim. Pract. 33:321-323.
  6. England GCW and Russo M. 2006. Ultrasonographic characteristics of early pregnancy failure in bitches. Theriogenology 66:1694-1698. https://doi.org/10.1016/j.theriogenology.2006.01.028
  7. Kim BS, Ko JS, Hwang SS, Lee SA, Cho YT, Oh KS, Park IC, Kim JT, Kim YH and Son CH. 2004. Ultrasonographic appearance of the gestational structures throughout pregnancy in Shih-tzu bitches. II. Estimation of gestational age by measurement of the fetal and extra-fetal structures. Korean J. Vet. Clin. 21:143-148.
  8. Kim JH, Jeong KA, Kang HG, Oh KS, Park IC, Park SG, Han HJ and Son CH. 2000. Relationship between vaginal cytology and reproductive hormone during the estrous cycle in Korea Jin-do bitches. Korean J. Vet. Clin. Med. 17:225-233.
  9. Kutzler MA, Mohammed HO, Lamb SV and Meyers-Wallen VN. 2003. Accuracy of canine parturition date prediction from the initial rise in preovulatory progesterone conception. Theriogenology 60:1187-1196. https://doi.org/10.1016/S0093-691X(03)00109-2
  10. Lenard ZM, Hopper BJ, Lester NV and Richardson JL. 2007. Accuracy of prediction of canine litter size and gestational age with ultrasound. Aust. Vet. J. 85:222-225. https://doi.org/10.1111/j.1751-0813.2007.00162.x
  11. Luvoni GC and Grioni A. 2000. Determination of gestational age in medium and small size bitches using ultrasonographic fetal measurements. J. Small Anim. Pract. 41:292-294. https://doi.org/10.1111/j.1748-5827.2000.tb03204.x
  12. Moriyashi M, Waki Y, Nakao T and Kacoata K. 1996. Observation of the growth process of a Beagle embryo and fetus by ultrasonography. J. Vet. Med. Sci. 58:443-445. https://doi.org/10.1292/jvms.58.443
  13. Naurtup CP, Tobias R and Cartee RE. 2000. An Atlas and Textbook of Diagnostic Ultrasonography of the Dog and Cat. 1st Ed, Manson Publishing, London, pp. 290-307.
  14. Oh KS, Kim BS, Park SG, Park CH, Kim JH, Mun BG, Kim HS, Lee JH, Park IC, Kim JT, Suh GH and Son CH. 2008. Growth curve of the gestational structures by ultrasonography examination in small pet dogs. J. Emb. Trans. 23:147-153.
  15. Pharr JW and Post K. 1992. Ultrasonography and radiography of the canine postpartum uterus. Vet. Radiol. Ultras. 33:35-40. https://doi.org/10.1111/j.1740-8261.1992.tb01954.x
  16. Schutte AP. 1967. Canine vaginal cytology. I. Technique and cytology morphology. J. Small Anim. Pract. 8:301-306. https://doi.org/10.1111/j.1748-5827.1967.tb04554.x
  17. Son CH, Kang BK, Choi HS, Seo DH, Shin CR and Park IC. 1997. Ultrasonographic appearance of the gestational structures, throughout pregnancy in pet dogs. II. Estimation of gestational age and precition of parturition day by measurement of the gestational structures. Korean J. Vet. Clin. 14:287-296.
  18. Son C, Jeong K, Kim J, Park I, Kim S and Lee C. 2001. Establishment of the prediction table of parturition day with ultrasonography in small pet dogs. J. Vet. Med. Sci. 63: 715-721. https://doi.org/10.1292/jvms.63.715
  19. Wallace SS, Mahaffer MB, Miller DM, Thompson FN and Chakraborty PK. 1992. Ultrasonographic appearance of the ovaries of dogs during the follicular and luteal phases of the estrous cycle. Am. J. Vet. Res. 53: 209-215.
  20. Yeager AE, Mohammed HO, Meyers-Wallen V, Vannerson L and Concannon PW. 1992. Ultrasonographic appearance of the uterus, placenta, fetus, and fetal membranes throughout accurately timed pregnancy in Beagles. Am. J. Vet. Res. 53:342-351.
  21. Zambelli D, Caneppele B, Bassi S and Paladini C. 2002. Ultrasound aspects of fetal and fetal and extrafetal structure in pregnant cats. J. Feline Med. Surg. 4:95-106. https://doi.org/10.1053/jfms.2001.0153