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Table 2 Obstetric and neonatal outcome of the OHSS, fresh transfer and frozen transfer groups

From: Obstetric outcomes following ovarian hyperstimulation syndrome in IVF – a comparison with uncomplicated fresh and frozen transfer cycles

  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
  1. Data presented as mean ± SD or n (%) as appropriate.
  2. SD standard deviation, n number, Premature delivery – under 37 weeks