During the trunk to tail transition the mammalian embryo builds the outlets for the intestinal and urogenital tracts. lays down the primordia for the hindlimb and external genitalia. and switches from the epiblast/primitive streak (PS) to the tail bud as the driver of axial extension. Genetic and molecular data indicate that Tgfbr1 is a key regulator of the trunk to tail transition. https://jalyttlers.shop/product-category/sofa-table/