Phase contrast (A–C) and H&E staining (D–F) of E7.5 embryos resulting from Sec24c+/− intercrosses. E7.5 embryos were removed from the decidua and photographed prior to fixation (A–C), or whole decidual swellings were fixed and sectioned (D–F). Images are representative of the types of embryonic development/loss observed in 22 embryos. A, B, and D illustrate normal gastrulation. Genotypes were obtained for A–C (A, Sec24c+/+; B, Sec24c+/−; C, Sec24c−/−). The embryo in C exhibits thinning of the embryonic ectoderm. E illustrates a disorganized embryo, and F shows remnants of the egg cylinder. Anterior is to the left of each embryo; A = amniotic fold; EPC = ectoplacental cone; PS = primitive streak. Arrow in F indicates remnants of the embryo.