Imagine you have been walking the aisles of your favourite bookstore for an hour, letting your gaze gaily hop from one spine to the next. You smell the ink and the paper. You hear the dulcet tones...
The menstrual cycle of humans is complicated. It consists of a luteal and follicular phase, follows a roughly 21-day cycle, and has many effects beyond the shedding of the uterine lining.
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