I am going to turn 18 after 24 days,my height is 5' 7" , will it still grow ?

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I have heard in many cases that height grows upto the age of 18 and some where i heard upto 21. But ,as i am a medical student , i know it increases ! Don't know the exact ending period. I am going to turn 18 and my height is 5 feet 7 inches.Will it still increase.If yes, i will do more stretching exercises and all to be more tall. Please give your opinions.