Fig. 3

Endometrial dating in control and RIF groups. a Inner-group differences in endometrial biopsy dating in the control group at different times (PO + 3/5/7/9/11) were rare, as proven by two experienced pathologists. Using the mean ± SD as the lower and upper limits to define a reference range for endometrial biopsy dating, 1 of 50 control women were below the range. b The out-of-phase rate in the good-prognosis group was different from that for the RIF group. c Endometrial dating according to the Noyes criteria in RIF patients (X 400). Dating + 3, gland cytoplasm and nuclei above and vacuoles below (arrow); dating + 4, glandular nuclei are in the center of the cells and glycogen vacuoles are seen on two sides of the gland nuclei (arrow); dating + 5, vacuoles (arrow) remain in the basement membrane of the gland cells; dating + 10, pre-decidua (arrow) begin to differentiate and spiral arteries increase