Figure 1.

Immunoperoxidase staining for STAT3. a) Transversal cut of uterus on day 7, immunoreaction is evident in the decidual and predecidual cell. b) In the same day observe the immunolocalization of STAT3 in uterine glands. c) Transversal cut of uterus on day 9, show the STAT3 in the nucleus of giant trophoblast cells (asterisk), in the decidual cells and epithelium of the new light (arrow). d) In day 10, STAT3 is distributed in the placental tissues and in the mesometrial decidua (MD) and e) in the labyrinth region, STAT3 is observed in the trophoblast cells (arrows). f) In day 12, minor presences of STAT3 are observed in the mesometrial deciduas (MD), however in the placental tissues the immunoreaction is maintained. g, h, i) Representative negative control of immunohistochemistry. AD, antimesometrial deciduas; S, spongiotrophoblast region; mBV, maternal blood vessels; *, giant trophoblast cells. Scale bar: 100 µm.