Successful Pregnancy following Mixed Double Embryo Transfer in a Patient with Variable Window of Implantation

Figure 1

Endometrial cycle dating based on Noyes et al.’s criteria and immunohistochemical analysis for progesterone receptors (PR) of woman’s endometrium. Paraffin embedded sections of the endometrium before and during the window of implantation (WOI). Pinopodes on luminal epithelium were confluent; glands secretion and stromal edema were well developed during WOI (b) compared to the prereceptive phase (a). The expression of progesterone receptors in patient’s endometrium was lower during the window of implantation (b).