measurement
The average age for the start of menstruation is 12, though it can begin as early as 8 or as late as 16 years old, typically occurring within a few years of the development of breasts and pubic hair.
Authors
Sources
- Menstrual Cycle (Normal Menstruation): Overview & Phases my.clevelandclinic.org via serper
Referenced by nodes (2)
- menstruation concept
- breast concept