Table 3 Neonatal outcomes
|  | Group M1 (n = 20) | Group M2 (n = 20) | Group M3 (n = 20) | Group M4 (n = 20) | P value |
|---|---|---|---|---|---|
Apgar score at 1 min | 9 (8 ~ 10) | 9.5 (8 ~ 10) | 10 (9 ~ 10) | 10 (9 ~ 10) | 0.008 |
Apgar score at 5 min | 10 (10 ~ 10) | 10 (10 ~ 10) | 10 (10 ~ 10) | 10 (10 ~ 10) |  |
Umbilical arterial blood gases: | |||||
 pH | 7.27 ± 0.03 | 7.28 ± 0.02 | 7.27 ± 0.03 | 7.28 ± 0.02 | 0.64 |
 PaO2(mmHg) | 17.5 ± 4.2 | 21.9 ± 5.1 | 21.3 ± 4.4 | 21.7 ± 3.5 | 0.005 |
 PaCO2,(mmHg) | 49.0 ± 4.2 | 46.2 ± 4.0 | 47.7 ± 4.8 | 44.7 ± 3.3 | 0.008 |
 Base excess(mM) | −1.2 ± 0.8 | −1.1 ± 0.7 | −1.1 ± 0.7 | −1.6 ± 0.8 | 0.08 |