A newly created cell model of the amniotic sac could reveal new insights into early pregnancy, as well as generate helpful ...

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The yolk sac is a primitive structure that usually disappears after 20 weeks' gestation. A remnant of the yolk sac merges in the forming embryo into the primitive gut.

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Embryonic macrophage development occurs in several waves. 5, 6 In the first primitive hematopoiesis, myeloid progenitors arise in the yolk sac posterior plate mesoderm around embryonic day 7. A few ...

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BCAS2 directly binds to the Armadillo repeats 9–12 of β-catenin via the coiled-coil domains, sequestering β-catenin within the nucleus and thereby promoting Wnt signaling during primitive ...