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. 2014 May 15;64(6):409–416. doi: 10.1007/s13224-014-0559-7

Table 3.

Menstrual characteristics after NuvaRing® use-per protocol population

Statistics Baseline First cycle (N = 204) Second cycle (N = 204) Third cycle (N = 204)
Average cycle length (days) Mean (SD) 32.1 (9.92) 26.7 (4.06) 26.9 (3.43) 26.8 (2.54)
Average duration of menstruation (days) Mean (SD) 4.2 (2.04) 3.8 (1.24) 3.7 (1.13) 3.6 (0.98)
Intensity of menstruation (pad[s]/day) Mean (SD) 2.0 2.0 2.0 2.0

Denominator is the number of women in each cycle