http://www.slate.com/blogs/blogs/humannature/archive/2008/05/19/incest-and-delayed-motherhood.aspx
..."By age 45, the probability of Down syndrome alone roughly matches the 4 percent cumulative risk of birth defects from cousin marriage"....
..."By age 45, the probability of Down syndrome alone roughly matches the 4 percent cumulative risk of birth defects from cousin marriage"....
...and no we are not neighbors...and incest is bad...I just pointed out the error in Lady T's title for the thread starter!