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Nichole Tyson, MD, has advice for young people seeking help for menstrual problems – including painful, irregular or heavy periods.

Nichole Tyson, MD, has advice for young people seeking help for menstrual problems – including painful, irregular or heavy periods.

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Researchers at Stanford Medicine have created a detailed map of how cells in the placenta change during pregnancy.

Researchers at Stanford Medicine have created a detailed map of how cells in the placenta change during pregnancy.