Figure 4. When considering the estradiol level in blood that could affect to pregnancy rate. The comparative of estradiol levels between over 1,000 and below 1,000 pg/ml was determined in relative mRNA expression and also compared between thin endometrial thickness (TEM) and normal endometrial thickness (NEM) groups. The graph was depicted in relative mRNA expression (Mean±SEM) of endometrial gene expression at different locations, including the basalis (A-C); the luminal epithelium (D); the stroma (E); the perivascular region (F-H).