Table 1. Maternal and fetal characteristics.

Data summarized by mean ± SEM or n (%). p-Values calculated via t-test (continuous variables) or Chi-square contingency table (categorical variables).

	<35 weeks	>39 weeks	p-Value
	n=9	n=11
Gestational age at delivery (weeks)	34.0±0.3	39.5±0.1	<0.0001
Maternal age (years)	31.9±0.9	36.2±1.0	0.008
Maternal BMI >40	1 (11)	0 (0)	0.26
Maternal race
White	7 (78)	9 (82)	0.13
Black	2 (22)	0 (0)
Asian	0 (0)	2 (18)
Primiparous	4 (44)	4 (36)	0.71
Female neonate	5 (55)	8 (73)	0.42
Indication for delivery	Placenta previa (3)	Scheduled repeat (7)
	Vasa previa (4)	Breech presentation (3)
	Thinned lower uterine segment (2)	Elective (1)