Rosemary is 13-years-old and has just experienced her first menstrual period. Rosemary has experienced:

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Menarche is the first menstrual period experienced by a girl, typically occurring around the age of 12-13. Spermarche is the first ejaculation in boys and typically occurs around the age of 13-14. The adolescent growth spurt is a period of rapid physical growth that occurs during adolescence, typically around the age of 11-14 for girls. Menopause is the cessation of menstruation and typically occurs in women in their late 40s to early 50s.

Rosemary Is 13-Years-Old and Has Just Experienced Her First Menstrual