Just as on the demand side, the position of the supply can shift, say from a change in the price of a productive input or a technical improvement. The Law of Supply states that, in general, a rise in price leads to an expansion in supply and a fall in price leads to a contraction in supply.
Puberty takes place over a number of years, and the age at which it starts and ends varies widely. It generally begins somewhere between the ages of 7 and 13 for girls, and somewhere between the ages of 9 and 15 for guys, although it can be earlier or later for some people.
Tanner stage five: Final Adult Height and Body. 1  This final stage usually occurs at just over 14 years of age. 2  Girls will stop growing about 1-2 years after menstruation begins, reaching their full adult height by age 14-15. 3  Breasts and genitals are fully developed at the end of this stage.nce their period starts, girls typically gain another 1 to 2 inches in height, reaching their full adult height by age 14 or 15. However there is a very broad range of time in which girls hit puberty-related growth spurts.