Table 1.
Comparison of the parameters for natural pregnancy and IVF pregnancy
| Factor | Natural pregnancy (n = 1453) | IVF pregnancy (n = 157) |
|---|---|---|
| Maternal age (years) | 35.2 ± 4.5 | 38.8 ± 3.8 |
| Weeks of gestation | 39.0 ± 1.2 | 39.1 ± 1.3 |
| Primipara (n) | 850 | 132 |
| Maternal weight gain (kg) | 9.2 ± 2.9 | 8.6 ± 2.7 |
| Prepregnancy maternal BMI | 20.7 ± 2.6 | 20.7 ± 2.4 |
| Infant weight (g) | 3016.2 ± 350.7 | 3037.9 ± 401.4 |
| Infant head circumference (cm) | 32.9 ± 1.4 | 33.0 ± 1.5 |
| Cross section of the placenta (cm2) | 340.0 ± 75.3 | 344.7 ± 85.7 |
| Placental weight (g) | 594.0 ± 103.2 | 603.5 ± 117.8 |
| Umbilical cord length (cm) | 55.4 ± 11.4 | 55.3 ± 12.8 |
| Cross section of umbilical cord (cm2) | 1.6 ± 1.0 | 1.6 ± 1.6 |
| Velamentous insertion of cord, n (%) | 145 (9.9) | 32 (20.3) |