It's time for women and girls to speak about their periods
Updated 0430 GMT (1230 HKT) October 3, 2018
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CNN is committed to covering gender inequality wherever it occurs in the world. This story is part of As Equals, a year-long series.
Amina J. Mohammed is the Deputy Secretary-General of the United Nations and Nigeria's former Minister of Environment. The opinions expressed in this commentary are hers.