Do you know what is deputy milk?

Furu brought from the womb. In the sixth week of human embryos, embryos with only a little more than 1 cm, its trunk the ventral sides of the formation of thickened ectodermal ridge cell, which is equivalent to the groin, armpit arc connection, these two ridges protrusions called raw milk line, line, there are many breast primordial.
Since people generally only one child or twins birth, not many breast, so only the chest of a primordial continued development of breast, nipple bud formation. Three months to the embryo, the formation of breast duct. Origin of the rest of the breast usually subside gradually after the ninth week embryo. Such as degradation was incomplete, the formation of excess in the breast after birth, medicine is called Furu or breast disease.
Furu formation in addition may be the result of not fully degraded, the Furu may be the result of external deformation makes the breast. Because long-term wearing inappropriate or too tight underwear coat, will result in the oppression of the chest. Sharpened like a tight shirt, or wearing a small, poor coating of underwear, the original will is easily fleshy chest and pushing back, so the formation of Furu.