Gross and ultrasonic morphology of the equine conceptus on days 10 to 40.

Autor: Gille JF; Eutheria Foundation, Cross Plains, Wisconsin 53528, USA; Department of Animal and Dairy Sciences. University of Wisconsin-Madison, Madison, WI, 53706, USA., Ginther OJ; Eutheria Foundation, Cross Plains, Wisconsin 53528, USA. Electronic address: oginther@wisc.edu.
Jazyk: angličtina
Zdroj: Journal of equine veterinary science [J Equine Vet Sci] 2023 Dec; Vol. 131, pp. 104959. Date of Electronic Publication: 2023 Nov 03.
DOI: 10.1016/j.jevs.2023.104959
Abstrakt: The gross and ultrasonic equine embryo morphology are described with emphasis on specific days after ovulation. Included are labeled colored photographs and detailed descriptions of the embryo proper (future fetus and foal) and of the entire embryonic vesicle on Days 21, 24, 30, 35/36, and 40. A few related aspects are included for the early fetus on Days 45 and 50. Regression lines for growth in the length of the embryo proper and diameter of the embryonic vesicle along with the mean days of the morphological event are included. Ultrasonograms of the embryonic vesicle are shown and discussed from Days 10 to 45. Major morphological changes in the embryo proper include: (1) appearance of forelimb and hindlimb buds, (2) appearance of the pontine flexure, (3) appearance of the genital tubercle, (4) closure of the pontine flexure, and (5) tapering of limbs toward the midline with hoof-shaped tips. Major changes in the embryonic vesicle are: (1) vascularization of mesoderm, (2) appearance of sinus terminalis, (3) emergence of allantoic sac, (4) formation of embryonic circulatory system, (5) formation and maturation of chorionic girdle, and (6) transition from yolk sac to allantoic sac.
Competing Interests: Declaration of Competing Interest Neither of the authors have any financial or personal relationships that could inappropriately influence or bias the content of the paper.
(Copyright © 2023 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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