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Table 2 Neonatal data for boys, girls, and combined in preterm (< 37 weeks) pregnancies

From: Sex differences in fetal growth and immediate birth outcomes in a low-risk Caucasian population

 

Total (N = 576)

Boys (N = 317, 55.0%)

Girls (N = 259, 45.0%)

p value*

GA at birth (wks, 0/7d), mean ± std

34wks6/7 ± 2wks2/7

35wks0/7 ± 2wks1/7

34wks5/7 ± 2wks3/7

0.19

Birth weight (g), mean ± std

2481 ± 637

2553 ± 604

2392 ± 665

0.003

Length (cm), mean ± std

46.3 ± 4.2

46.8 ± 4.1

45.7 ± 4.3

0.005

HC (cm), mean ± std

32.5 ± 2.5

32.8 ± 2.4

32.2 ± 2.6

0.006

1-min AS ≤ 5

8.1%

8.6%

7.4%

0.62

5-min AS ≤ 7

7.9%

8.9%

6.7%

0.32

pH Umb Art, mean ± std

7.29 ± 0.07

7.285 ± 0.070

7.289 ± 0.076

0.50

  1. Neonatal demographic data available in 576 preterm cases “2002–2012.” *p value represents difference in boys vs girls
  2. GA gestational age, wks weeks d days, g gram, cm centimeter, HC head circumference, AS Apgar scores, pH pondus hydrogenium, Umb Art umbilical artery, std standard deviation