| | CG (N = 65) | HG (N = 33) | χ2/t/Z | P |
| | Female | | | | | | Age (year) | 29.28 ± 3.60 | 30.09 ± 3.70 | −1.047 | 0.298 | | BMI (kg/m2) | 22.21 ± 3.65 | 22.38 ± 3.09 | −0.230 | 0.819 | | Infertility duration (year) | 2 (1, 3) | 2 (1, 3) | −0.746 | 0.456 | | Infertility type (case (%)) | — | — | 0.006 | 0.941 | | Primary infertility | 34/65 (52.3) | 17/33 (51.5) | — | — | | Secondary infertility | 31/65 (47.7) | 16/33 (48.5) | — | — | | Basic FSH (mIU/mL) | 6.86 ± 1.56 | 7.44 ± 2.04 | −1.554 | 0.123 | | Basic LH (mIU/m) | 4.38 (2.87, 5.58) | 4.63 (3.10, 6.55) | −0.752 | 0.452 | | Basic E2 (pg/mL) | 45.39 ± 14.84 | 45.49 ± 18.93 | −0.028 | 0.978 | | AFC (n) | 11 (8, 15) | 10 (7, 14) | −1.453 | 0.146 | | Ovulation induction (case (%)) | — | — | 2.188 | 0.139 | | Short-acting long-term regimen | 21/65 (32.3) | 6/33 (18.2) | — | — | | Antagonist regimen | 44/65 (67.7) | 27/33 (81.8) | — | — | | Gn used dosage (U) | 1687.5(1,462.5, 2,025.0) | 1,575.0 (1,350.0, 1,912.5) | −0.864 | 0.388 | | Gn used duration (day) | 8 (7, 9) | 7 (7, 8) | −1.319 | 0.187 | | Average E2 level of follicles with diameter ≥14 mm on hCG trigger day (pg/mL) | 254.73 (195.58, 389.63) | 255.31 (193.23, 330.09) | −0.274 | 0.784 | | Endometrial thickness on hCG trigger day (mm) | 10.45 (9.40, 12.07) | 11.00 (9.83, 12.40) | −1.027 | 0.305 | | Endometrial classification on hCG trigger day (case (%))# | — | — | 0.121 | 0.728 | | A | 60/65 (92.3) | 29/33 (87.9) | — | — | | B | 5/65 (7.7) | 4/33 (12.1) | — | — | | Number of retrieved oocytes (n) | 9.26 ± 2.91 | 8.42 ± 3.75 | 1.218 | 0.226 | | Number of MII stage oocyte (n) | 7 (5, 8) | 6 (4, 8) | −0.333 | 0.739 | | MII stage oocyte rate (%) | 70.0 (57.9, 100.0) | 76.2 (54.78, 100.0) | −0.633 | 0.527 | | Number of oocytes used for fertilization (n) | 9.11 ± 2.97 | 8.18 ± 3.78 | 1.328 | 0.187 | | Proportion of fresh embryo transfer cycle (case (%)) | 65 (22.6) | 33 (26.6) | 0.782 | 0.377 | | D3 embryos/blastocyst transfer ratio (case) | 45/20 | 24/9 | 0.128 | 0.720 | | Number of embryos transferred (n) | 1.52 ± 0.50 | 1.39 ± 0.50 | 1.206 | 0.231 | | Male | | | | | | Age (year) | 30.52 ± 4.33 | 30.00 ± 4.23 | 0.569 | 0.571 | | BMI (kg/m2) | 24.17 ± 3.13 | 24.95 ± 2.32 | −1.271 | 0.207 | | Infertility type (case (%)) | — | — | 0.414 | 0.520 | | Primary infertility | 39/65 (60.0) | 22/33 (66.7) | — | — | | Secondary infertility | 26/65 (40.0) | 11/33 (33.3) | — | — | | Semen analysis | — | — | — | — | | Semen volume (mL) | 3.22 ± 1.34 | 2.60 ± 1.15 | 2.279 | 0.025 | | Sperm concentration (106/mL) | 84.29 ± 61.58 | 85.50 ± 63.62 | −0.091 | 0.928 | | Total sperm motility (%) | 52.23 ± 17.05 | 48.09 ± 23.07 | 1.005 | 0.317 | | Progressive motility (%) | 41.17 ± 14.50 | 37.96 ± 18.61 | 0.938 | 0.351 | | Total sperm count (106) | 249.08 ± 171.59 | 229.10 ± 200.01 | 0.515 | 0.608 |
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