Are there natural ways to grow bigger boobs or only way is surgery?

Weight gain: Besides pregnancy and weight gain there are no non-surgical alternatives to enlarging your breasts at home.

Breast size is: likely to ^ w/ puberty, pregnancy, breast feeding & possibly prior to your period. You can build up chest muscles w/ exercise & weight lifting but it will not ^ the amt. of fatty tissue. There are no pills, herbs or machines that will ^ breast size. Breast augmentation is surgical enlargement. A padded bra will ^ appearance of volume. A supportive, well fitting bra can also enhance appearance.