Table 1 Patients’ characteristics and neonatal outcome after fresh cleavage-stage embryo transfer
|  | Vitrolife (n = 419) | SAGE (n = 1336) | p |
|---|---|---|---|
Maternal age (years) | 30.84 ± 4.05 | 31.47 ± 4.17 | 0.007 |
Maternal weight (Kg) | 52.63 ± 6.73 | 52.10 ± 6.79 | 0.22 |
Body Mass Index (kg/m2) | 20.77 ± 2.79 | 20.73 ± 3.18 | 0.81 |
Nulliparous | 388 (92.6) | 1244 (93.1) | 0.74 |
Gestational age (weeks) | 38.47 ± 1.43 | 38.32 ± 1.50 | 0.07 |
Birthweight (g) | 3196.0 ± 468.9 | 3168.4 ± 462.0 | 0.29 |
Birthweight z-score | 0.11 ± 1.02 | 0.11 ± 0.99 | 0.10 |
Low Birthweight (<2500Â g) | 21 (5.0) | 68 (5.1) | 1.00 |
Macrosomia (>4000Â g) | 23 (5.5) | 49 (3.7) | 0.12 |
Boys | 236 (56.3) | 700 (52.3) | 0.16 |
Preterm birth | 27 (6.4) | 90 (6.7) | 0.91 |
Small for gestational age (SGA) | 54 (12.9) | 153 (11.4) | 0.44 |
Large for gestational age (LGA) | 21 (5.0) | 63 (4.7) | 0.80 |