Can natural hormone replacement help with breast growth?

Not a good idea: Although hormones can stimulate breast tissue and cause some enlargement, there are risks too. This is true whether the hormones are natural or not.

Bad idea: It is not a good idea to alter the size of your breasts by altering your hormone levels. The level of one hormone has a huge effect on the level of the others and so adjusting one can have a widespread effect and results that you may not anticipate or want. If you want larger, more shapely breasts your best best is to go with a breast implant.