JAMA: Maternal BMI

"Maternal Body Mass Index and the Risk of Fetal Death, Stillbirth, and Infant Death"
http://jama.jamanetwork.com/article.aspx?articleid=1860462
"Conclusions and Relevance  Even modest increases in maternal BMI were associated with increased risk of fetal death, stillbirth, and neonatal, perinatal, and infant death. Weight management guidelines for women who plan pregnancies should take these findings into consideration to reduce the burden of fetal death, stillbirth, and infant death."