Sometimes, an answer emerges to explain why a 6-year-old girl with Type 1 diabetes starts to writhe uncontrollably on her right side and has a voice tremor, or why a woman in her 50s is bulking up without any apparent reason.

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The answer is not very: currently only 1.6% of women in that demographic do.

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The average answer we get each time we ask is around 6.5.

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