From Glen Stanton at Focus on the Family:
Since 1991, there have a been a number of good, population-based studies exploring the connection between premarital sexual activity and later elevated risk of divorce.
Just recently, another good study was published on the topic, prompting me to do a little research round-up/summary of the nice handful of studies addressing this question.
It is important that adolescents and young adults have access to this information indicating how sexual choices made today can have real, significant negative consequences upon their most important relationships - and therefore their lives and general well-being - years down the road.
Here is the concise two-page summary of this body of research.