i Register
In some senses, menstruate is marked as obsolete, rare. Watch for register when choosing this word.
verb
To stain with or as if with menses.
To undergo menstruation, to have a period.
A woman may have every quality or attribute of marriageableness who menstruates irregularly, or rarely, or even who has never menstruated at all.
Among the ancient Iranians, the puerpera, like the menstruating woman, was regarded as "unclean".
adj
Menstrual.