Table 3.

Total Pregnancy and Survival Rates per One Hundred Women Pregnant Within Twelve Cycles of Use (N = 216 Cases and 1256 Cycles).

Cycles	SR	SE	Preg.	N
0	.981	.009	4	212
3	.951	.016	5	141
6	.890	.027	7	100
9	.880	.028	1	89
12	.859	.035	1	40

Note: Total pregnancy rate includes all pregnancies outside of the inclusion criteria, SR = survival rate per one hundred women over twelve cycles of use, SE = standard error, Preg. = number of pregnancies per every three cycles of use and N = number of women exposed.