Why are my boobs sore before my period?

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Why Do My Boobs Get Bigger Before My Period?

What does it mean when you have sore, tender, heavy breasts a week after ovulation? My cycle isn't due for two weeks. - Quora

Sore Breasts and Menopause: Know the Facts

Sore Breasts Before Period: Causes and Hormone Imbalance – Nourished Natural Health

Breast Pain Reasons Your Boobs Feel Sore, Tender, Heavy

What To Know About Breast Pain Before a Period

Why do my boobs hurt every month?, The Fornix

The Real Reason Your Breasts Are Sore Before Your Period - Nicole Jardim