Table 3 Perinatal outcomes of once-vitrified group and re-vitrified group before and after PS matching
Before matching | After matching | |||||
|---|---|---|---|---|---|---|
Once-vitrified group (n = 592) | re-vitrified group (n = 55) | P | Once-vitrified group(n = 54) | re-vitrified group (n = 54) | P | |
Gestational age, weeks | 38 (37–39) | 38 (37–39) | 0.92 | 38 (37–39) | 38 (37.7–39) | 0.09 |
PTB (< 37 weeks) | 89 (15.0) | 9 (16.4) | 0.79 | 11 (20.4) | 9 (16.7) | 0.80 |
Neonatal abnormalities | 7 (1.2) | 0 (0.00) | 1.00 | 0 (0.0) | 0 (0.00) | / |
Birthweight, g | 3356.8 ± 582.1 | 3412.6 ± 666.4 | 0.87 | 3390.6 ± 601.5 | 3412.8 ± 672.6 | 0.86 |
LBW (< 2500 g) | 32 (5.4) | 4 (7.3) | 0.56 | 2 (3.7) | 4 (7.4) | 0.67 |
Macrosomia (≥ 4000 g) | 75 (12.7) | 9 (16.4) | 0.44 | 6 (11.1) | 9 (16.7) | 0.58 |
LGA | 134 (22.6) | 13 (23.6) | 0.86 | 16 (29.6) | 12 (22.2) | 0.38 |
SGA | 15 (2.5) | 0 (0) | 0.63 | 1 (1.9) | 0 (0) | 0.49 |
Gender | 0.45 | 0.44 | ||||
Boy | 333 (56.3) | 28 (50.9) | 33 (61.1) | 28 (51.9) | ||
Girl | 259 (43.7) | 27 (49.1) | 21 (38.9) | 26 (48.1) | ||
Boys | ||||||
Gestational age, weeks | 38 (37–39) | 38 (37–39) | 0.48 | 37 (37–38.5) | 38 (37–39) | 0.36 |
Birthweight, g | 3406.5 ± 585.4 | 3459.3 ± 792.4 | 0.09 | 3479.1 ± 593.1 | 3459.3 ± 792.4 | 0.17 |
LBW (< 2500 g) | 17 (5.1) | 3 (10.7) | 0.20 | 1 (3.0) | 3 (10.7) | 0.32 |
Macrosomia (≥ 4000 g) | 50 (15.0) | 6 (21.4) | 0.37 | 4 (12.1) | 6 (21.4) | 0.53 |
Girls | ||||||
Gestational age, weeks | 38 (37–39) | 38 (37–39) | 0.59 | 38 (36.5–39) | 38 (38–39) | 0.23 |
Birthweight, g | 3292.8 ± 572.5 | 3364.2 ± 515.2 | 0.14 | 3251.4 ± 602.2 | 3362.8 ± 525.3 | 0.32 |
LBW (< 2500 g) | 15 (5.8) | 1 (3.7) | 1.00 | 1 (4.8) | 1 (1.8) | 1.00 |
Macrosomia (≥ 4000 g) | 25 (9.6) | 3 (11.1) | 0.74 | 2 (9.5) | 3 (11.5) | 1.00 |