Freezing women's eggs to treat infertility is no longer an experimental procedure, according to the American Society for Reproductive Medicine. Still, the procedure remains costly and controversial and many questions remain about the effectiveness and safety of using long-term egg-freezing.
Scientists have made changes in human DNA that can be passed down from one generation to the next. The researchers say they took the step to try to prevent women from giving birth to babies with genetic diseases. But the research is raising a host of social and moral questions.
We're right on the verge of wiping out polio globally. But to do that, children in remote regions of Pakistan and Afghanistan must be inoculated with the heat-sensitive vaccine — not once, but multiple times. Time to call in the donkeys.
Because we had better food, our brains grew bigger than those of our primate cousins, scientists say. Early humans cooked, which makes meat and veggies more digestible and nutrients more available to the body. Plus, there was all that chatting and chewing around the campfire.
On a foot patrol in Kandahar, Nick Staback lost both of his legs after he stepped on a homemade bomb. Over the next year, his mother, Maria, became a tough coach as he learned to walk on two prosthetic legs, and together they adjusted to what she calls the "new normal" for their family.
Public health officials are trying to strike a balance between alerting, diagnosing and treating patients who might be at risk of fungal infections — and not overdiagnosing and overtreating those who aren't at risk. The caution is warranted. This type of infection can smolder for weeks before exploding into meningitis or causing massive strokes.
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