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“The lining of the womb (endometrial tissues) is ‘spilled’ into other parts of the reproductive organs,” explains Dr Peter Chew, a gynaecologist at Gleneagles.
As a result, the patient can suffer from severe bleeding and menstrual pain.
Even well-known personalities around the world aren’t spared from this condition, which experts say affect around 1 in 10 women.
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Main photo: iStock