The female breast contains tube-like structures called ducts. When a woman is breastfeeding, these ducts bring milk from the milk-producing glands to the area around the nipple. This allows the milk to flow from the breast to the infant.

Breastfeeding
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A ductogram is a test to create images of the breast ducts. It is done with a mammogram and special contrast dye.

A ductogram is done to look for the cause of abnormal discharge from the nipples.