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Purpose The morphological changes and expression patterns of neuronal antigens of human embryos, obtained from the therapeutic termination of pregnancy or from surgical procedures, were analyzed in order to characterize the secondary neurulation. Methods A total of 21 human embryos from Carnegie stages 12 to 23 and two fetuses in early stages were studied. The markers used for immunohistochemical...
Objective The goal of our study was to evaluate the expression patterns of neuronal antigens during the process of secondary neurulation. Materials and methods Chick embryos of Hamburger and Hamilton stages 16, 18, 20, 22, 24, 26, 30, 35, 40, and 45 were harvested, and tail sections were processed for neuronal antigen studies. Results and conclusions The areas and periods showing positive reactions...
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