Fig. 4. Immunocytochemistry of occludin, claudin-1, ZO-1 and ZO-2 proteins at the implantation site induced by E₂ in P₄-primed delayed mice. Photomicrographs of representative uterine sections are shown at 40x. Am, antimesometrial side; bl, blastocyst; em, embryo; ge, glandular epithelium; le, luminal epithelium; m, mesometrial side; myo, myometrium; pdz, primary decidual zone; s, stroma; sdz, secondary decidual zone. Scale bar: 400 µm.