the.com/menstruation
The body's monthly memo that pregnancy was, once again, optional.
means The roughly monthly shedding of the uterine lining when a fertilized egg doesn't show up to claim it.
from From Latin menstruus, meaning monthly, itself rooted in mensis, month — the same moon-counting that gave us months in the first place.
Lifetime tallyAround 450 periods over the average reproductive years.
Hidden costBlood loss is mostly mucus, tissue, and lining.
Cycle mythTwenty-eight days is an average, not a rule.
Language tieSame root as month, moon, and measure.