The latest development involves researchers in San Francisco whose work helped a preborn baby with a blood disorder.
A preborn baby was diagnosed with alpha thalassemia major, which causes life-threatening swelling and an enlarged heart. It's also a condition in which doctors often recommend abortion - but not this time.
They gave her blood transfusions to get the swelling down, then with the last blood transfusion, they did an adult stem cell transfusion using the mother's adult stem cells. The adult stem cells are taken from the mother's bone marrow and injected into the umbilical vein to the baby.
Four months later, the child was born and appears to doctors to be a healthy newborn.
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