Association Between Proximity to Animal Agriculture During Pregnancy and Spontaneous Preterm Birth Among Nulliparous Women in a California Cohort.
BACKGROUND Environmental exposures during pregnancy may influence risk of spontaneous preterm birth, a serious adverse outcome. Concentrated Animal Feeding Operations (CAFOs) near maternal residences may emit pollutants associated with preterm birth. METHODS We analyzed n = 811,953 births to nulliparous women in Cali...