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The relationship between serum estradiol (E2) and cycle follicle outcomes in the various infertile groups. (A) Serum from each infertile group was collected, and serum E2 (pg/mL) was analyzed by radioimmunoassay (RIA). (B) Serum E2 per follicle in each group was compared. The E2 content in the serum before removing the eggs was divided by the number of follicles. The p-value for each group versus the male factor group was determined by an unpaired t-test.
