Table 4 Patients characteristics and perinatal outcomes between the two groups with singleton live birth
| Â | Group 1 (101) | Group 2 (400) | P |
|---|---|---|---|
Age (year) | 29.30 ± 3.56 | 30.39 ± 3.90 | 0.018* |
BMI (kg/m2) | 21.71 ± 3.02 | 21.60 ± 2.82 | 0.937 |
Endometrial thickness (mm) | 9.41 ± 1.61 | 9.44 ± 1.41 | 0.394 |
The indications for IVF/ICSI | |||
 Pelvic and tubal factor | 53 (52.5%) | 227 (56.8%) | 0.439 |
 Male infertility | 29 (28.7%) | 164 (41.0%) | 0.023* |
 Endometriosis | 3 (3.0%) | 33 (8.3%) | 0.066 |
 PCOS | 19 (18.8%) | 53 (13.3%) | 0.155 |
> 20 oocytes retrieved | 44 (43.6%) | 176 (44.0%) | 0.937 |
progesterone> 1.5 ng/ml | 36 (35.6%) | 123 (30.8%) | 0.345 |
Protocol for COH | Â | Â | 0.096 |
 Agonist | 87 (86.1%) | 315 (78.8%) |  |
 Antagonist | 14 (13.9%) | 85 (21.2%) |  |
Method of fertilization | Â | Â | 0.025* |
 IVF | 54 (53.5%) | 262 (65.5%) |  |
 ICSI | 47 (46.5%) | 138 (34.5%) |  |
Gestational age (day) | 272.13 ± 8.09 | 271.75 ± 10.88 | 0.928 |
Birth weight(g) | 3327.43 ± 456.84 | 3372.40 ± 519.11 | 0.456 |
Delivery mode | Â | Â | 0.513 |
 Natural labor | 10 (9.9%) | 49 (12.3%) |  |
 Caesarean delivery | 91 (90.1%) | 351 (87.7%) |  |
Gender | Â | Â | 0.507 |
 Male | 63 (62.4%) | 235 (58.8%) |  |
 Female | 38 (37.6%) | 165 (41.2%) |  |
Abnormal perinatal outcomes | |||
 Preterm birth<37 weeks | 4 (4.0%) | 29 (7.3%) | 0.234 |
 Gestational hypertension | 7 (6.9%) | 29 (7.3%) | 0.912 |
 GDM | 8 (7.9%) | 39 (9.8%) | 0.573 |
 Placenta previa | 4 (4.0%) | 13 (3.3%) | 0.758 |
 Fetal malformation | 2 (2.0%) | 6 (1.5%) | 0.665 |
 Macrosomia≥4000 g | 3 (3.0%) | 42 (10.5%) | 0.018* |
 Low birthweight<2500 g | 4 (4.0%) | 18 (4.5%) | 1.000 |