A woman's period normally stops during the ages of 45 and 55 years which is when the change of life usually happens for most woman.
However some women may have the change of life a little early at around age 40 or 39 which is sometimes when a woman's period stops.
Your period usually stops when you go through menopause but when you reach 45 to 55 years of age then your period is usually no longer happening to you.
My mom's period stopped for her at age 46 but started slowing down when she reached 45.
There's no set age that a woman will stop her period but eventually you should be over the period and should no longer have a period after age 55.