NYT :: Health

Living Together: In Studies of Virtual Twins, Nature Wins Again

When parents pursue several ways to have a child, the stage is set for virtual twins, genetic strangers who share an environment from an early point in life.<br/><br/><span class="advertisement"> <a href="http://www.pheedo.com/click.phdo?x=07ef2180cee44d9abb689f9f7fe272d1&u=http://www.nytimes.com/2008/09/04/garden/04twins.html"><img src="http://www.pheedo.com/img.phdo?x=07ef2180cee44d9abb689f9f7fe272d1&u=http://www.nytimes.com/2008/09/04/garden/04twins.html" border="0"/></a></span>