Fig. 6. Immunocytochemistry of ZO-1 protein in a day-6 deciduum induced by intact blastocysts or trophoblast vesicles and deciduoma induced by oil. Photomicrographs of representative uterine sections are shown at 100x magnifications. (a) A normal implantation site with a implanting blastocyst; (b) a decidual area induced by oil (deciduomata), and (c) a decidual area induced by trophoblastic vesicle (Tr). Am, anti-mesometrial side; em, embryo; le, luminal epithelium; m, mesometrial side; pdz, primary decidual zone; sdz, secondary decidual zone; Tr, trophectoderm. Scale bar: 50 µm.