The decline in the female hormone estrogen in women is a natural progression due to the deterioration of the ovary. In normal women. This process usually takes place from the age of 25, started markedly after age 30. However, in some women the ovaries have been removed due to occupational disease or excessive force, prolonged stress, then this process can take out sooner.
Therefore, women should start treatment at age 30 or sooner if you notice signs of decline in the female hormone estrogen.