| | CG (N = 288) | HG (N = 124) | χ2/t/Z | P |
| | Female | | | | | | Age (year) | 29.32 ± 3.54 | 29.60 ± 3.32 | −0.753 | 0.452 | | BMI (kg/m2) | 22.51 ± 3.54 | 22.67 ± 5.55 | −0.333 | 0.739 | | Infertility duration (year) | 2 (1, 3) | 3 (2, 4) | −1.375 | 0.169 | | Infertility type (case (%)) | — | — | 0.287 | 0.592 | | Primary infertility | 152/288 (52.8) | 69/124 (55.6) | — | — | | Secondary infertility | 8,136/288 (47.2) | 55/124 (44.4) | — | — | | Basic FSH (mIU/mL) | 6.98 (5.90, 8.13) | 7.04 (6.08, 8.09) | −0.359 | 0.719 | | Basic LH (mIU/mL) | 4.12 (3.22, 5.46) | 4.42 (3.13, 5.98) | −0.255 | 0.799 | | Basic E2 (pg/mL) | 43.00 (34.00, 54.88) | 43.97 (34.34, 55.00) | −1.599 | 0.110 | | AFC (n) | 10 (8, 15) | 10 (8, 14) | −0.102 | 0.919 | | Ovulation induction (case (%)) | — | — | 1.382 | 0.240 | | Short-acting long-term regimen | 65/288 (22.9) | 22/124 (17.70) | — | — | | Antagonist regimen | 222/288 (77.1) | 102/124 (82.3) | — | — | | Gn used dosage (U) | 1,725.00 (1,500.00, 2,025.00) | 1,725.00 (1,575.00, 1,950.00) | −0.790 | 0.429 | | Gn used duration (day) | 8 (7, 9) | 8 (7, 8) | −0.368 | 0.713 | | LH levels on hCG trigger day (mIU/mL) | 2.26 (1.55, 4.11) | 2.80 (1.55, 4.66) | −1.388 | 0.165 | | P levels on hCG trigger day (ng/mL) | 1.19 (0.86, 1.48) | 0.99 (0.81, 1.48) | −1.777 | 0.075 | | E2 levels on hCG trigger day (pg/mL) | 2,640.00 (1,878.00, 4,201.00) | 2,492.00 (1,643.36, 4,275.00) | −1.039 | 0.299 | | Average E2 level of follicles with diameter ≥14 mm on hCG trigger day (pg/mL) | 408.77 (297.06, 575.08) | 388.89 (254.67, 570.65) | −1.731 | 0.083 | | Number of retrieved oocytes (n) | 9 (6, 12) | 9 (6, 12) | −0.436 | 0.663 | | Number of MII stage oocyte (n) | 6 (4, 8) | 6 (4, 8) | −0.692 | 0.489 | | MII stage oocyte rate (%) | 62.5 (55.6, 75.0) | 60.0 (53.8, 100.0) | −0.129 | 0.897 | | Number of oocytes used for fertilization (n) | 9 (6, 12) | 9 (6, 12) | −0.311 | 0.756 | | Male | | | | | | Age (year) | 30.86 ± 4.63 | 29.55 ± 3.53 | 2.814 | 0.005 | | BMI (kg/m2) | 24.22 ± 3.49 | 25.82 ± 4.09 | −4.052 | <0.001 | | Infertility type (case (%)) | — | — | 1.912 | 0.167 | | Primary infertility | 172/288 (59.7) | 83/124 (66.9) | — | — | | Secondary infertility | 116/288 (40.3) | 41/124 (33.1) | — | — | | Semen analysis | — | — | — | — | | Semen volume (mL) | 3.09 ± 1.42 | 2.65 ± 1.17 | 3.217 | 0.001 | | Sperm concentration (106/mL) | 84.32 ± 56.46 | 72.26 ± 49.21 | 2.065 | 0.040 | | Total sperm motility (%) | 51.47 ± 18.35 | 46.56 ± 20.32 | 2.412 | 0.016 | | Progressive motility (%) | 40.37 ± 15.56 | 37.53 ± 16.71 | 1.658 | 0.098 | | Total sperm count (106) | 236.13 ± 168.79 | 191.71 ± 156.60 | 2.503 | 0.013 |
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