It was more than 30 years ago when the world greeted its first "test-tube" baby. Now, after years of study, researchers are finding few medical differences between these children and kids conceived in the traditional way.
More than 3 million children have been born worldwide as a result of what is called assisted reproductive technology, and they account for about 4 percent of live births today.
Researchers say the majority are healthy and normal. Still, these kids face an increased risk of some birth defects and of low birth weight -- and it's not immediately clear why that is.
The findings are being presented Sunday at the annual meeting of the American Association for the Advancement of Science in San Diego.
Copyright AP - Associated Press
