A member asked:

Why does never having been pregnant increase breast cancer risk?

A doctor has provided 1 answer

It is a long story: There is ton of medical literature which can answer your question. But you have to go to the library and read up in a book about Breast Diseases/ Cancer. It is felt to be due to protection provided by the many hormonal factors which change drastically during pregnancy.

Answered 3/8/2017

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