PMC5960520_01
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).
CRIOG2018-1687583.001.jpg
PMC5960520_01_CRIOG2018-1687583.001.jpg
fig1
To confirm this, a third endometrial biopsy was carried out in the next cycle but it showed the displacement of the implantation window by two days (nine days after ovulation) (Figure 1).