Asker's rating. 1  Human Growth Age. 2  There is a certain age at which most people usually stop growing: men - 25, women - 21. 3  Different parts of the body grow at different rates for example some people continue to grow in height till the age of 24 while for most it stops by the age of 18 to 21. The growth rate differs with respect to gender, race, climate, diet, heredity and a host of other factors.