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It's different for each person.

But, on average, three to five years after your period started.

It was pretty true for me, I started my period at 11. I stopped growing at 15. My breasts only changed if I gained or lost weight.

I learned this information from Human Sexuality classes. Can't tell you how many times they repeated it in the puberty and adolescent chapters. I paid 300 bucks for that class and 200 for that book, had a professor with two doctorates, so I doubt they'd give me false information.

Stage 6 of Female Puberty , which is between 15 - 17 years, the body attains full maturity.

All girls experience with puberty is differently, so there is no solid guild lines so you still have at least a year or more of the joys of puberty.

Menstruation as well as ovulation become regular during this period. Apart from these physical changes, most adolescents may also have to face the problem of acne. Estrogen and progesterone which are produced by the body during puberty are mainly responsible for this because they make the skin oilier, thus giving rise to acne.

My freshman biology teacher always told us 21. She was studying to become a MD before switching career tracks, if that means anything to you.

-E