Is there a way to make breasts bigger naturally for women?

Breast enlargement: There is nothing you can do. It is a false belief that if you work out your pectoral muscles that it will increase your breast size. Pregnancy can increase them.

Breast size: The breasts enlarge naturally with weight gain, puberty, pregnancy and breast-feeding. Some oral contraceptives can be associated with increase in breast size in some women (sometimes). Building up pectoral muscles can lead to the breasts sitting on the chest wall in a manner that is attractive but will not increase cup size.