In 19 nineties, after more than a decade of work, researchers said to day they have isolated and grown basic human stem cells. A stem cell is a type of cell that is full of potential and can usually become any type of cell in the body. Unlike other adult cells, which die, these stem cells can grow and divide indefinitely.
There's an old story scientists tell about human ovaries: that they are ticking clocks that only lose eggs, never gain them. Now that story might be changing, opening the door to new treatments for infertility and menopause.
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