. Author manuscript; available in PMC: 2012 Sep 10.

Published in final edited form as: J Matern Fetal Neonatal Med. 2009 Nov;22(11):983–992. doi: 10.3109/14767050902994747

Table I.

Demographic and clinical characteristics of women who underwent amniocentesis at midtrimester and term gestation not in labor and in spontaneous labor

	Midtrimester n=70	Termn No labor n = 23	Term In labor n = 48
Maternal age (years)	37 (35–38)^*	27 (21–32)	23 (20–27.5)
Nulliparity	12 (17.1)^**	5 (23.8) ^§	23 (47.9)
Gestational age at amniocentesis (wks)	16 (16–17)^*	39.7 (38.7–40)	39.1 (38–40.2)
Gestational age at delivery (wks)	39.5 (38–40)	39.5 (38.5–40)	39.1 (38–40.1)
Birthweight (g)	3345 (3103–3626.5) ^†	3430 (3130–3790) ^§	3265 (3092–3695)

Values are expressed as median (interquartile range) or number (percent)

^§

n=21

^†

n=69

p<0.05 compared to term not in labor and in labor

^**

p>0.05 compared to term in labor