Progesterone from ovulatory menstrual cycles is an important cause of breast cancer.

Breast Cancer Res · 2023 · PMC10228093 · PMID 37254150

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highly significantno p-value reported

A highly significant linear relationship between the BC risk and the cumulative number of MCs before a first full term pregnancy as well as for the life time number of MCs has been reported earlier already [ 11 , 12 ].

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