This Is Why You Have to Go Up a Bra Size During Your Period

Victoria Hoff
PHOTO:

Calvin Klein

Kylie Jenner got a lot of flak recently for crediting her cleavage to her menstrual cycle. But here's the thing: While we obviously can't confirm or deny her party line, she's not scientifically inaccurate. "Period boobs" are very much a thing, and it's quite normal for our breasts to fluctuate in size depending on the time of the month.

"Changes in the breast are very typical during the menstrual cycle due to hormonal fluctuations," says Jessica A. Shepherd, MD, a Chicago-based ob-gyn and expert for SweetSpot Labs, a feminine hygiene brand. "You may experience [increased swelling], tenderness, or pain. These changes usually subside in some form and are gone by the end of the cycle."

This all being said, Shepherd notes that it's still important to monitor your breasts on a regular basis—both on and off your period—to ensure that nothing is out of the ordinary. Keep reading to find out which changes are normal during your menstrual cycle and which should raise red flags.

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