Expert answer:
Visible veins in the breasts may be a sign of pregnancy, but in these cases, other symptoms, such as nausea, excessive hunger, frequent urination, and menstrual delay are usually present.
Another cause for the breasts of the breasts to be more visible than usual is pallor, which can be caused by anemia or just a natural tendency of the body itself, without actually representing a disease.
In any case, if you think that the veins in the breasts are more apparent than they usually are, the ideal is to make an evaluation with the gynecologist or mastologist.
