MHS	NHIS	ACS
	(1)	(2)	(3)
Age	26.93 [4.84]	30.11 [5.61]	30.85 [5.90]
Age at First Birth	24.54 [4.30]	25.05 [5.72]	--
Number of Children/ Number of Children in Household (ACS)	2.27 [1.20]	2.13 [1.12]	1.99 [1.20]
Low Birth Weight	0.033 [0.178]	0.072 [0.250]	--
Husband Information
White	0.777 [0.416]	0.845 [0.362]	0.790 [0.407]
Black	0.104 [0.304]	0.074 [0.262]	0.058 [0.234]
Officer (MHS) or Four-Year College Graduate (NHIS)	0.257 [0.437]	0.317 [0.466]	0.391 [0.488]
In the Labor Force	1 [0]	0.966 [0.182]	0.950 [0.217]
Unemployed	0 [0]	0.041 [0.199]	0.039 [0.194]
N	182,779	1,130	254,361

Notes: Military Health System (MHS) sample includes first and subsequent observed births. National Health Interview Survey (NHIS) sample constructed using the following restrictions: women from sample years 2003–2013, married to a spouse of the opposite sex, not on active duty, who have at least one child between the ages of zero and one. American Community Survey (ACS) sample constructed using the following restrictions: women from sample years 2003–2013, married to a spouse of the opposite sex, who had a child within the past year. Labor force and unemployment rules for active duty follow NHIS definitions.