Does every female get her period?
No, not every female gets her period. If talking exclusively of
those who are biologically female there are those who don't have
the anatomy to menstruate or their bodies don't produce the
hormones needed to have a menstrual cycle. Pre-pubescent girls
don't menstruate and women past menopause don't menstruate, also
women who are pregnant won't menstruate during pregnancy (sometimes
for longer if they breastfeed), and women who have a hysterectomy
to remove the uterus.