Marriage and low birth weights....

via Mercator "The Increasing Protection of Marriage on Infant Low Birth Weight Across Two Generations of African American Women," Journal of Family Issues

This study used data from the Panel Study of Income Dynamics (PSID) on two generations of African American women who gave birth from 1967 to 2005 to describe changing relationships between marital status and low birth weight (LBW) across the generations.

Intergenerational findings also suggest that marriage across generations was most protective against infant LBW; the lowest risk for LBW was found among women who were both married when they gave birth to their infants and had mothers who were married at the time they themselves were born.

The report's abstract here.... you have to pay for the full article.