Figure 7.
Schematic illustration of the role of uterine epithelial and stromal STAT3 in uterine receptivity and embryo attachment. Epithelial STAT3 regulates the formation of slit-like structure in uterine lumen, and stromal STAT3 suppresses proliferative activity and estrogenic response in the epithelium, thus controlling uterine receptivity and embryo attachment. PGR, progesterone receptor; LIF, leukemia inhibitory factor; LIFR, LIF receptor.