Emily Oster isn't a baby doctor. She's an economist and a mom who wanted to know more about all those rules handed down to women after the pregnancy stick goes pink.   Only two cups...

It was meant to be the happiest day of her life. Instead, Yulia Yukhimets' wedding ended with her being rushed to the hospital, weak, pale and hooked to an IV — together with nearly 60...

A British court has ruled for the first time that a man who lacked the capacity to give informed consent should have a vasectomy because it is in his "best interests."   The...

Sunny was 16 when she was left at an animal shelter by the family she had lived with all her life. The 75-pound (34-kilogram) bulldog-pit bull mix had cancer and infected eyes, and shelter workers...

Chinese scientists have found the strongest evidence yet that a new bird flu strain is sometimes able to spread from person to person, but they are emphasizing that the virus still does not transmit...

A new government report is the first evidence of a national decline in childhood obesity, health officials said Tuesday.   In 18 states, there were at least slight declines in obesity for...

The U.S. battle against smoking has moved outdoors.   City parks, public beaches, college campuses and other outdoor venues are putting up signs telling smokers they can't light up....

Higher blood-sugar levels, even those well short of diabetes, seem to raise the risk of developing dementia, a major new study finds. Researchers say it suggests a novel way to try to prevent...

Combat appears to have little or no influence on suicide rates among U.S. troops and veterans, according to a military study that challenges the conventional thinking about war's effects on the...

Scientists who sparked an outcry by creating easier-to-spread versions of the bird flu for research purposes want to try such experiments again using a worrisome new strain. This time around, the U.S....