What are the stages of embryonic development in chickens?
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The embryonic development stages in chickens involve crucial processes from fertilization to hatching. Initially, the fertilized oocyte progresses through stages like zygote formation, followed by the development of extra-embryonic tissues such as the sub-embryonic fluid, yolk sac, amnion, and chorion-allantois membrane (CAM) . During the incubation period, visible changes occur daily, including the formation of the cicatricle, cardiovascular system, rudimentary feathers, claws, and egg tooth . Transcription factors play a significant role in regulating gene expression patterns during early chicken embryo development, with Zf-C2H2, Homeobox, and bHLH being dominant families involved in embryogenesis . Macroscopic and microscopic observations reveal the identification of nervous system structures, skin, appendages, and sensory organs from the second day of incubation onwards, highlighting the chronological progression of embryonic development in chickens .
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| The stages of embryonic development in chickens studied were at 4.5, 8, and 12 days of incubation, with the most gene regulation observed between 8 and 12 days. | |
6 Citations | The stages of embryonic development in chickens include the identification of nervous system vesicles, skin vascularization, and early formation of organs related to vision and hearing from days 1 to 19. |
| The stages of embryonic development in chickens include Em1d to Em5d, crucial for gastrulation and organogenesis, with notable changes in gene expression patterns, especially during the Em2d to Em3d transition. | |
| The stages of embryonic development in ducks include cicatricle formation, cardiovascular system development, feather and claw formation, yolk retraction, eye opening, and eggshell pecking from days 1 to 27. | |
| The stages of embryonic development in chickens include fertilized oocyte, zygote, and hatched chicken, along with the development of extra-embryonic tissues like sub-embryonic fluid, yolk sac, amnion, and CAM. |
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