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Table 1 Characteristics of the study subjects meeting the inclusion criteria. Data are mean [range] or % (n/N). ap < 0.001 when compared to females

From: Sex differences in fetal Doppler parameters during gestation

Characteristic Female (n = 87) Male (n = 90)
Maternal age at delivery (years) 34 [23–43] 34 [18–43]
Maternal pre-pregnancy body mass index (kg/m2) 25.2 [17.5–43.6] 25.3 [17.4–43.6]
Race (%)   
 Asian 25 (22/87) 18 (16/90)
 Black or African American 9 (8/87) 13 (12/90)
 White 62 (54/87) 65 (58/90)
 Other 4 (3/87) 4 (4/90)
Gestational age at first ultrasound visit (weeks) 16 [15-17] 16 [12-17]
Cesarean delivery (%) 36 (31/87) 41 (37/90)
Gestational age at delivery (weeks) 38 [30–41] 38 [31–40]
Birth weight (g) 3159 [1390–4390] 3422 [1410–4630]a