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. Author manuscript; available in PMC: 2020 Sep 1.
Published in final edited form as: J Matern Fetal Neonatal Med. 2018 Mar 20;32(17):2820–2823. doi: 10.1080/14767058.2018.1449826

Table 1.

Baseline characteristics

Infertile N=277 Fertile N=3016 P-value
Maternal Age, years 37.4±5.3 31.5±5.3 <0.0001
Maternal Race, n(%) 0.023
White 193 (69.9) 2066 (68.8)
Black- or African-American 16 (15.8) 287 (9.6)
Asian or Asian-American 49 (17.8) 391 (13.0)
Other 18 (6.5) 260 (8.7)
BMI, kg/m2 23.3±4.6 23.0±4.6 0.3211
Mode of Conception, n(%) <0.0001
IVF 136 (49.1) 4 (0.13)
NIFT 73 (26.4) 4 (0.13)
Presumed Spontaneous 68 (24.5) 3008 (99.7)
Cesarean Delivery, n(%) 142 (51.8) 1078 (36.1) <0.001
Gestational age, weeks 38.9±2.3 39.4±1.7 <0.0001
Birth weight, gramsc 3268±634 3317±510 0.1378