Understanding cell fate patterning and morphogenesis in the mammalian embryo
remains a formidable challenge. Recently, in vivo models based on embryonic
stem cells (ESCs) have emerged as complementary methods to quantitatively
dissect the physical and molecular processes that shape the embryo. Here we
review recent developments in using embryonic stem cells to create both two and
three-dimensional culture models that shed light on mammalian gastrulation.Comment: 18 pages, 1 figur