Table 1.

Sociodemographic and clinical characteristics for mothers birthing male or female infants.

	Mean ± SD (Range) or % (N)
	Female (N=115)	Male (N=130)
Maternal Age (yr)	28.32 ± 5.44 (18–39)	29.07 ± 5.15 (18–39)
Maternal BMI at Delivery	31.46 ± 6.26 (22.66– 52.87)	32.75 ± 6.64 (21.40–52.62)
Ethnicity
Caucasian	32% (79)	40% (97)
Black	5% (13)	6% (15)
Hispanic	6% (15)	5% (11)
Other	3% (8)	3% (7)
Maternal Diabetes	12% (28)	15% (36)
Maternal Anemia	19% (47)	18% (44)
Prenatal Vitamins	39% (96)	48% (117)
Iron Supplements	14% (33)	9% (21)*
Insurance
Private Insurance	29% (72)	36% (87)
WIC or Medicaid	18% (43)	18% (43)
Gestational Age (wk)	39.37 ± 1.25 (35.5– 41.4)	39.35 ± 1.22 (35–42.2)
Mode of Delivery
Vaginal	36% (88)	40% (98)
Cesarean	11% (27)	13% (32)
Delayed Cord Clamping	13% (32)	15% (37)
Birth Weight (kg)	3.58 ± .6 (2.1–4.95)	3.67 ± .62 (2.09–4.7)
Ponderal Index	2.93 ± .39 (2.02–3.77)	2.91 ± .37 (2.02–3.83)

Demographic variables of all enrollees at birth are stratified by infant sex.

^*p <.05 from 2-sided t test or chi square comparing female and male infants.