Cell and stage-specific expression of NAPE-PLD in pregnant mouse uteri. The spatiotemporal accumulation of NAPE-PLD in the periimplantation uterus was examined by immunohistochemistry. Photomicrographs of representative uterine cross sections are shown (100X). le, luminal epithelium; ge, glandular epithelium; s, stroma; myo, myometrium; bl, blastocyst; em, embryo; IS, implantation site; Inter-IS, interimplantation site.