I keep reading that tuberous breasts are caused by hormonal issues, like PCOS, which can result in poor development of the breast due to lack of progesterone. It was even reported that one woman with TBD who had insufficient glandular tissue took natural progesterone during pregnancy and her breasts grew. However, the plastic surgeons I've talked to say it's a structural defect hat occurs in the womb and there's no way to fix it without surgery.
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