The start of menstruation in females is called?

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E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1221-1223
E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 65-80
Practise the full DSSSB - 29 August 2019 (Shift-2)
Attempt every question from this paper in a timed mock, then review the full solution for each one.