OHSS group n=44 | Fresh transfer group n=220 | Frozen transfer group n=220 | P | |
---|---|---|---|---|
Gestational age at delivery, weeks | 38.6 ± 1.9 | 38.7 ± 2.0 | 38.9 ± 1.7 | 0.43 |
Preterm delivery | 6 (13.6%) | 17 (7.7%) | 18 (8.2%) | 0.42 |
Preeclampsia | 1 (2.3%) | 10 (4.5%) | 9 (4.1%) | 0.78 |
Gestational hypertension | 0 | 3 (1.4%) | 8 (3.6%) | 0.15 |
Gestational diabetes | 3 (6.8%) | 11 (5.0%) | 22 (10.0%) | 0.13 |
Placenta previa | 0 | 4 (1.8%) | 2 (0.9%) | 0.50 |
Placental abruption | 3 (6.8%)a,b | 3 (1.4%)a | 2 (0.9%)b | 0.02 |
Instrumental delivery | 3 (6.8%) | 15 (6.8%) | 20 (9.1%) | 0.65 |
Cesarean delivery | 10 (22.7%) | 47 (21.4%) | 66 (30.0%) | 0.10 |
Blood transfusion, ante / postpartum | 1 (2.3%) | 3 (1.4%) | 8 (3.6%) | 0.30 |
Birth weight, grams | 3017 ± 483a | 3057 ± 545b | 3213 ± 542a,b | 0.004 |
Small for gestational age | 5 (11.3%) | 30 (13.6%) | 17 (7.7%) | 0.13 |