Table 3.

Contraceptive Efficacy of combined vaginal contraceptive ring (Nuvaring)

Study	Method	Pearl index
Our Study	Nuvaring (N = 184)	0
Roumen et al. 2001	Nuvaring (N = 1145)	0.65
Dieben et al. 2002	Nuvaring (N = 1177)	1.75
K. Oddsson et al. 2005	Nuvaring (N = 512)	1.23
Bruni et al. 2008	Nuvaring (N = 165)	0