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How to write menstruation in English?

Menstruation/menstruation

Menstruation (physiological) menstruation

Menstruation [Physiology] Menstruation, menstruation, dysmenorrhea, menstrual period

Menstruation; Menstruation; Menstruation; menses

Period; Period; menses

dysmenorrhoea

Ex: I have my period, and I have my period.

I am menstruating. I have my period.