Table 3.

Comparison of trimester of fetal demise for VAERS reports and the NCOW survey, 2009/2010 influenza season.

Trimester		VAERS reports, n (%)	NCOW reports, n (%)
First	(0–13 weeks)	74 (65.5)	40 (71.4)
Second	(14–27 weeks)	26 (23.0)	13 (23.2)
Third	(>27 weeks)	13 (11.5)	3 (5.4)
Total reports		113a (100.0)	56b (100.0)

VAERS: Vaccine Adverse Event Reporting System; NCOW: National Coalition of Organized Women.

^a113 (65%) of 174 total reports contained gestational date information; 62 (35%) did not.

^b56 (84%) of 67 total reports contained gestational information; 11 (16%) did not.