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Table 2 Patients’ characteristics and neonatal outcome after frozen-thawed cleavage-stage embryo transfer

From: The effects of embryo culture media on the birthweight of singletons via fresh or frozen-thawed embryo transfer: a large-scale retrospective study

  Vitrolife
(n = 202)
SAGE
(n = 413)
p
Maternal age (years) 30.07 ± 3.79 30.64 ± 3.86 0.08
Maternal weight (Kg) 52.58 ± 7.56 52.24 ± 7.00 0.57
Body Mass Index (kg/m2) 20.35 ± 3.66 20.62 ± 2.82 0.32
Nulliparous 186 (92.1) 383 (92.7) 0.74
Gestational age (weeks) 38.68 ± 1.34 38.39 ± 1.59 0.03
Birthweight (g) 3300.6 ± 441.3 3256.0 ± 466.7 0.27
Birthweight z-score 0.30 ± 0.99 0.29 ± 0.97 0.96
Low Birthweight (<2500 g) 7 (3.6) 15 (3.7) 1.00
Macrosomia (>4000 g) 12 (6.2) 16 (4.0) 0.23
Boys 105 (52) 205 (49.6) 0.61
Preterm birth 8 (4.3) 23 (6.0) 0.38
Small for gestational age (SGA) 15 (8.2) 29 (7.6) 0.80
Large for gestational age (LGA) 11 (6.0) 23 (6.1) 0.33
  1. Data are presented as number (%) or mean ± SD