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(A) Incidences (%) and (B) duration (median number of days) of breakthrough bleeding-spotting for N0MAC/E2 (grey bars) and DRSP/EE (black bars). The incidences were compared statistically between the treatment groups. *p < 0.05 vs. DRSP/EE. NOMAC, nomegestrol acetate; E2, oestradiol; EE, ethinylestradiol; DRSP drospirenone.
