I am 16 yrs old but does not have a height of that age..my mom is also short..what is the maximum age till girls gain height? what can be done ?

Height: Height is genetically determined, so chances are you will also be on the short side. A girl's growth can continue to 18-21 years of age

Expectations: Your height is determined by the genetic influences of your parents and your lifestyle/diet/rest/exercise. We expect any female to grow to be the average of her parents height less 5 cm. You grow about 7cm after your first menses. By age 16 you are likely near the end of your growth as most stop at 16-17 .