Immunolocalization of SERPINE2 in the mouse uterus during early pregnancy. Uterine sections prepared from a pregnant uterus on days 0.5 (A), 4.5 (B), and 7.5 (C, D, and a-d) were histochemically stained as described in Figure 2. A control section stained with control antiserum is shown (C). The black and white bars indicate 500 and 50 μm, respectively. amz, antimesometrial zone; cm, circular muscle; dec, decidua; e, embryo; gc, giant cells; ge, glandular epithelium; le, luminal epithelium; lm, longitudinal muscle; mz, mesometrial zone.