NuvaRing Efficacy
								Intention to-Treat												Following Protocol
			Women								1,145										1,019
			Treatment cycles							12,109											9,880
			Pregnancies									6										3
			Pearl Index (95% CI)
																			0.40 (0.24–1.41)
		Roumen FJ, et al. Hum Reprod. 2001;16:469-475.