Breast feeding and breast cancer.

Clinicians who deal with numerous cases of breast cancer are aware of the fact that there is some relationship between childbearing and breast cancer, and also that nulliparous women are probably more prone to breast cancer than their parous sister. however, a relationship between breast feeding and breast cancer is not certain. This is a preliminary report on a study of the breast feeding habits of breast cancer patients and non-cancerous patients, after an attempt was made to match controls for parity and age.