Characteristic (mean [SD]) | Age subgroup | All patients (n = 2220) | |
---|---|---|---|
≤35 years (n = 692) | >35 years (n = 1528) | ||
Age, years | 31.6 (2.57) (n = 692) | 38.7 (2.14) (n = 1528) | 36.5 (4.00) (n = 2220) |
BMI, kg/m 2 | 23.1 (4.10) (n = 683) | 23.1 (3.92) (n = 1502) | 23.1 (3.98) (n = 2185) |
FSH level (on cycle days 2–4), IU/L | 10.6 (12.06) (n = 209) | 10.3 (10.91) (n = 395) | 10.4 (11.31) (n = 604) |
LH level, IU/L | 5.22 (7.92) (n = 448) | 4.53 (6.57) (n = 837) | 4.77 (7.07) (n = 1285) |
E 2 level, pg/mL | 42.00 (77.51) (n = 431) | 43.9 (66.86) (n = 814) | 43.3 (70.7) (n = 1245) |
AMH, ng/mL | 2.1 (3.08) (n = 45) | 1.5 (1.56) (n = 135) | 1.7 (2.06) (n = 180) |
Endometrial thickness, mm | 3.42 (3.57) (n = 344) | 3.41 (1.66) (n = 717) | 3.41 (2.45) (n = 1061) |
AFC (number of follicles <11 mm) | 6.8 (5.07) (n = 210) | 4.5 (3.64) (n = 440) | 5.3 (4.29) (n = 650) |