Some racial disparities in childbirth more environmental than genetic

A new study investigating racial disparities in birth outcomes shows that contrary to some theories, vitamin D is unlikely to play a role in differences in preterm birth and low birth weight between African-Americans and whites. "For years there has been this hypothesis that African-Americans have worse birth outcomes because they have more melanin in their skin which reflects the sun and therefore lowers levels of Vitamin D," said the study's author. "But in examining the relationship between u...