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  4. AVEF - Conférence Annuelle - Reims, 2016
  5. Suivi du développement de l’embryon par échographie
AVEF 2016 - Reims, France
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Suivi du développement de l’embryon par échographie

Author(s):
Bruyas J.F.
In: AVEF - Conférence Annuelle - Reims, 2016 by Association des Vétérinaires Équins Français
Updated:
NOV 06, 2016
Languages:
  • FR
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    Read

    Historiquement, la détection de l’embryon par échographie représente la première application, il y a un peu plus de 35 ans, de l’échographie en gynécologie équine. En 1986, le premier ouvrage d’échographie vétérinaire (1) traitait de l’échographie transrectale de l’appareil génital de la jument, et en a inspiré beaucoup (2, 3, 4, 5, 6).
    Après une saillie ou une IA préovulatoire la fécondation a lieu dans les 6 heures qui suivent l’ovulation. Le J0 de la gestation est le moment de l’ovulation.
    Moins de 20 heures après les pronucléi fusionnent La première mitose embryonnaire se produit peu avant le début de J1.
    Au cours du transit tubaire, le nombre de cellules formant l’embryon double toutes les 20-24 heures. Ainsi, 96 heures post-ovulation, il compte 8 à 12 cellules. (7)
    Le stade de développement et le moment de passage dans la cavité utérine varient beaucoup d’un embryon à l’autre. Certains y pénètrent au stade morula, la plupart au stade jeune blastocyste. Peu d’embryons ont déjà pénétré dans l’utérus avant 144 heures post-ovulation et la majorité y entre au cours de la 6ème journée (entre 144 et 168 heures), certains n’y arrivant qu’encore plus tardivement jusqu’à J9 (8). Chez certaines juments âgées, chez celles inséminées avec du sperme congelé ou en phase post-ovulatoire, l’arrivée de l’embryon dans l’utérus semble retarder d’au moins 24h.  [...]

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    About

    How to reference this publication (Harvard system)?

    Bruyas, J. (2020) “Suivi du développement de l’embryon par échographie”, AVEF - Conférence Annuelle - Reims, 2016. Available at: https://www.ivis.org/library/avef/avef-conférence-annuelle-reims-2016/suivi-du-développement-de-l’embryon-par-échographie (Accessed: 04 October 2023).

    Author(s)

    • J.F. Bruyas

      Bruyas J.F.

      Assistant Professor
      DMV, PhD, Agrege, Dipl. ECAR
      Biotechnology of Reproduction and Pathology, Department of Clinical Sciences, École Nationale Veterinaire de Nantes,
      Read more about this author

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