How do i enlarge breasts by natural phenomena?

Pregnancy: There is not a natural method to have specific increase to breast size besides pregnancy.

Wt/inserts/ bra/baby: While bra insert sets are the best way to non-surgically enhance the breast, the only other natural way is to gain weight, get pregnant or lactate via natural methods. Hormonal manipulation may do this but is generally not recommended. On occasion, some women experience larger breasts with oral contraception. The brava or noogleberry external vacuum devices may also provide some enlargement.