. Author manuscript; available in PMC: 2010 Aug 1.

Published in final edited form as: Am J Obstet Gynecol. 2009 Aug;201(2):146.e1–146.e6. doi: 10.1016/j.ajog.2009.05.015

Table 2.

Description of ECP use prior to and during the study period in the analysis population (N=718)^a

	History of ECP use at baseline (N=212)		No history of ECP use at baseline (N=504)

	n	%	n	%

First ECP Use in Study
None	129	61	360	71
Before first follow-up visit	60	28	114	23
Between follow-up visits	23	11	30	6

ECP, emergency contraceptive pill

Two women could not recall at baseline whether they had ever previously used ECPs.