When will she acquire her term?

My 11 year old neice hasn't gotten her interval yet. She have some hair contained by her private [so her mom speaks] and she doesn't yet ALWAYS be a traning bra,so you can see her breasts developing. When do you think she will attain her period?
Height:5'4
Weight:101 I wouldn't verbs. The normal age of menarche ranges from 10-17 beside some girls starting younger or older than that. The average age contained by North America is 12-13.
Your first period usually comes w/i 1-2 years of the signs of puberty so from the information you give that would indicate that your niece will start between 12-14. But it can be longer w/o need to verbs. Hope this helps :)
13 or 14. she's pretty little