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See how your body works and what happens with a symptom, examination or treatment.

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Four phases of the menstrual cycle with internal anatomy: menstruation, build-up of the lining, ovulation from an ovary and thickened lining.
Medical illustration · Bo Dòkter Enlarge image (new tab)

Breasts, vagina and womb

Menstrual cycle

The diagram links changes in the ovary and womb lining during the menstrual cycle.