Breast cancer incidence in women with a history of progesterone deficiency.

Authors: Cowan LD, Gordis L, Tonascia JA, Jones GS.

Publication Year: 1981

Citation: Am J Epidemiol 1981; 114:209-17.

1083 infertile women were followed for 14-34 years. Those who were deficient in progesterone showed a five-fold greater incidence of premenopausal breast cancer.