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Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles | npj Digital Medicine
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Menstrual cycle. Ovarian cycle: follicular phase and luteal phase. Uterine cycle: Secretory phase, proliferative phase and menstruation. Vector Stock Vector Image & Art - Alamy
![Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles | npj Digital Medicine Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles | npj Digital Medicine](https://media.springernature.com/lw685/springer-static/image/art%3A10.1038%2Fs41746-019-0152-7/MediaObjects/41746_2019_152_Fig3_HTML.png)