Table 1 Baseline characteristics after matching
|  | Case (n = 113) SERa(+) cycle | Control (n = 113) SERa(-) cycle | P value |
|---|---|---|---|
Age (years) | 30 (28, 34) | 30 (28, 33) | 0.807 |
BMI (kg/m2) | 21.5 (20.3, 23.5) | 21.6 (19.5, 23.4) | 0.353 |
FSH (IU/L) | 6.7 (6.1, 8.4) | 6.8 (5.9, 8.0) | 0.506 |
AMH (ng/mL) | 4.0 (2.5, 7.5) | 4.3 (2.7, 7.5) | 0.583 |
AFC | 14 (9, 22) | 15 (11, 20) | 0.479 |
ART attempts | 1 (1, 1) | 1 (1, 1) | 0.277 |
Infertility durations (years) | 2.0 (0.0, 3.0) | 1.5 (0.7, 3.0) | 0.984 |
Infertility types | Â | Â | 0.786 |
 Primary, %(n) | 40.7 (46) | 38.9 (44) |  |
 Secondary, %(n) | 59.3 (67) | 61.1 (69) |  |
COH protocols | Â | Â | 0.905 |
 GnRH agonist protocol, %(n) | 62.8 (71) | 65.5 (74) |  |
 GnRH antagonist protocol, %(n) | 30.1 (34) | 27.4 (31) |  |
 Other protocola, %(n) | 7.1 (8) | 7.1 (8) |  |
Gonadotropin dosage (IU) | 2475 (1823, 3000) | 2325 (1860, 2963) | 0.946 |
Gonadotropin duration (days) | 10 (9, 11) | 10 (9, 12) | 0.381 |
Estradiol on HCG day (pg/mL) | 3000 (1756, 4386) | 2417 (1635, 4435) | 0.339 |
Progesterone on HCG day (ng/mL) | 0.9 (0.6, 1.3) | 0.9 (0.6, 1.3) | 0.746 |
Endometrium thickness on HCG day (mm) | 11.3 (9.0, 13.3) | 10.6 (9.1, 12.7) | 0.510 |
No. of large follicles | 12 (9, 16) | 12 (8, 16) | 0.574 |