This article was reviewed by Julia Switzer, MD, FACOG. If you’re entering perimenopause or menopause, you’ve probably heard about hormone replacement therapy (HRT) — and you might be wondering about ...

Progesterone is part of hormone replacement therapy (HRT) for people who have been through menopause and still have a uterus. Possible side effects include spotting, headaches, and breast tenderness.

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