TABLE 4.

Pregnancy Data Among Users of the 52-mg LNG IUS From McNicholas et al., 2017¹⁷

	Year 6	Year 7
No. of women	496
Woman-years of observation	696.9
No. of pregnancies	2
Pregnancy rate per 100 woman-years (95% CI)	0.25 (0.04, 1.42)	0.43 (0.08, 2.39)

Abbreviations: CI, confidence interval; LNG IUS, levonorgestrel-releasing intrauterine system.