Do infertility treatments damage babies'genes? Doctors used to think not．Now they are not so sure．
In the 24 years since the birth of Louise Brown，the world's first test－tube baby，thousands of would－be parents have been assure that as far as scientists knew there was no extra risk of genetic damage associated with in－vitro fertilization，or IVF．No matter how sperm meets egg--whether in a woman's body or in a Petri dish（and even if the sperm needs some help getting inside the egg）--nature is equally vigilant about preventing serious genetic mishaps from coming to term．With those assurances，test－tube births have soared from a few hundred a year in the early 1980s to tens of thousands today．
If a man’s mother is highly educated, chances are the woman he marries will have a similar education, according to a new study.
Researchers at the University of Iowa found that nearly 80 percent of high-achieving men who were sons of mothers with college degrees married women with a similar education.