Normally, after adulthood the breasts are finalized and can’t grow any bigger. Under normal circumstances, the adult breasts will not continue to develop, the chest can not continue to grow larger. Breast development is closely related to its physiological structure. The core part of the breast is the mammary gland, which is the key to breast development. The development of mammary glands is usually completed at the age of 16 to 18. Therefore, the size of the breast is basically fixed after adulthood. And in some special circumstances or periods, breasts can also increase in size to a certain extent. For example, pregnancy can cause changes in hormone secretion levels, which in turn cause the proliferation of breast tissue, resulting in the enlargement of the glands. At the same time, the accumulation of fat tissue caused by obesity can also make the breasts look bigger. It is recommended that patients who want to further develop their breasts should visit a regular hospital and choose the appropriate method under the advice of a doctor.