Ask Sofia: What is a healthy menstrual cycle?

You’re probably not surprised to hear that your menstrual cycle can affect everything from your mood to your sleep, and your energy to your appetite. While there is no “perfect” period, a normal menstrual cycle—the first day of one cycle to the first day of the next—will range from about 25 to 35 days and may shift as we age. Naturally, birth control, pregnancies and peri-menopause can also change the length and symptoms of your cycle.

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