Table 3.
Maternal characteristics and perinatal outcomes in singleton sibling pair in fresh/FET and FET/FET cohort.
| Fresh/FET cohort | FET/FET cohort | ||||||
|---|---|---|---|---|---|---|---|
| Fresh embryo transfer (n = 158) | FET (n = 158) | p-values | FET1 (n = 25) | FET2 (n = 25) | p-values | ||
| Maternal age (years), mean (SD) | 31.4 (4.07) | 33.9 (4.03) | <0.0001 | Maternal age (years), mean (SD) | 32.8 (5.29) | 34.9 (5.39) | 0.1748 |
| Tobacco exposure (%) | 2 | 3.9 | 0.5625 | Spontaneous cycle (%) | 28 | 24 | 0.8543 |
| Occurrence of gesational diabete (%) | 13.7 | 16.2 | 0.7515 | Artificial cycle (%) | 56 | 60 | 0.8543 |
| Male sex (%) | 46.2 | 53.16 | 0.2171 | Stimulated cycle (%) | 16 | 16 | 0.8543 |
| Gestational age (weeks), mean (SD) | 38.6 (2.01) | 38.39 (1.5) | 0.2961 | Male sex (%) | 44 | 32 | 0.3924 |
| Preterm birth (%) | 5.06 | 8.23 | 0.4412 | Gestational age (weeks), mean (SD) | 38.56 (1.39) | 38 (1.15) | 0.1275 |
| Very preterm birth (%) | 2.53 | 0.63 | 0.4412 | Preterm birth (%) | 12 | 12 | 1 |
| Birthweight (g), mean (SD) | 3247.09 (506.13) | 3499.46 (468.26) | <0.0001 | Birthweight (g), mean (SD) | 3371.44 (436.37) | 3395.88 (373.62) | 0.8325 |
| Number of embryos transferred | 1.25 (0.46) | 1.16 (0.4) | 0.0929 | Number of embryos transferred | 1.36 (0.57) | 1.2 (0.5) | 0.2961 |