By 
Nassim Assefi and Brian A. Levine
 | 
TED-Ed Original

How in vitro fertilization (IVF) works

Infertility affects 1 in 8 couples worldwide. But in the last 40 years, more than 5 million babies have been born using in vitro fertilization (IVF). How does it work? Nassim Assefi and Brian A. Levine detail the science behind making a baby in a lab.

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biology
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