Like the APA, I suspect this is a politically motivated stance.
http://www.narth.com/docs/gendercomplementarity.html
Gender Complementarity and Child-rearing: Where Tradition and Science Agree
A. Dean Byrd, Ph.D. MBA, MPH*
S. J. QUINNEY COLLEGE OF LAW
Journal Of Law & Family Studies
University Of Utah
VOLUME 6 NUMBER 2
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I. INTRODUCTION
The notion that all "family forms" are equally as helpful or healthful for children has no basis in science. Indeed, there is no better example than the extensive research on children reared in single-parent families. The most authoritative evidence on children growing up in single-parent families (most often headed by single mothers) concluded that such children are three times more likely to have a child out of wedlock, twice as likely to drop out of high school, 1.4 times more likely to be idle (out of school and out of work) and 2.5 times more likely to be teen mothers. Lest one might suggest that the lower socio-economic level of children alone accounts for such statistics, these conclusions were reached subsequent to adjustments for income-related variables such as race, sex, mother's/father's education, number of siblings, and place of residence (McLanahan & Sandefur, 1994). Perhaps, if we follow these statistics further, another picture emerges. Of children born out-of-wedlock, their chances of living in poverty are five times greater than that of growing up within intact families. Additionally, children born out of wedlock have a two to three times greater probability of having psychiatric problems as adolescents (Popenoe, 1996). Following this statistic even further, early sexual activity poses a great danger for adolescent health. Adolescents account for more than 25 percent of all sexually transmitted diseases (STDs) nationally. Women are twice as likely as men to acquire gonorrhea, chlamydia and hepatitis.
Yup. But at the time (and even now) people have come to accept divorce as normal as marriage - its so common and people forget or don't realize the negative affect it will have on your kids. And I say that as a single-parent. Had society not been so accepting of divorce, one has to wonder how mych better off our kids would be. Gay marriage is only going to add to the problem.
About sums it up for me.