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Developmental changes in the mouse amnion: a SEM study

J N Scott, L J Ream, P B Pendergrass

    Journal of Submicroscopic Cytology
    |October 1, 1982
    PubMed
    Summary
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    Scanning electron microscopy revealed significant changes in mouse amnion surfaces from 13 to 21 days of gestation. Surface cell morphology and fiber patterns altered, suggesting functional shifts or aging processes.

    Area of Science:

    • Developmental Biology
    • Cell Biology
    • Reproductive Science

    Background:

    • The amnion is a crucial extraembryonic membrane essential for fetal development.
    • Understanding amnion surface morphology provides insights into its protective and functional roles.

    Purpose of the Study:

    • To investigate the morphological changes on both surfaces of the mouse amnion during late gestation.
    • To characterize the ultrastructural alterations in amnion epithelial and mesenchymal cells.

    Main Methods:

    • Scanning electron microscopy (SEM) was employed to examine the amnion.
    • Samples were collected from mouse embryos at 13, 16, and 21 days of gestation.

    Main Results:

    • The exocoelomic surface transitioned from fine, random fibers to thick, woven patterns by day 21.

    Related Experiment Videos

  • The ectodermal lining showed changes in microvilli, progressing from short patches to increased density, loss, or microridge formation by day 21.

    • Conclusions:

    • Observed morphological changes in the mouse amnion suggest potential alterations in its function during development.
    • These surface modifications may also be indicative of cellular aging processes within the amnion.