Although breast growth varies from patient to patient, it generally stops between 16 and 20 years of age. Even though growth stops, the breasts continue to undergo changes for the remainder of a woman's life. This is affected by weight gain, pregnancy lactation and gravity.Unfortunately, how these factors impact any particular woman is variable. In many cases, pregnancy and lactation can actually make the breasts smaller. For this reason, the most reliable method of addressing breast hypoplasia in someone in your age group is with breast augmentation surgery.Under these circumstances, consultation with a board certified plastic surgeon is appropriate. This surgeon should be able to formulate a treatment plan that addresses your anatomic findings and achieves your aesthetic goals.