What causes so much preterm birth in Fresno County?

Fresno County, in the San Joaquin Valley of California (CA) has significantly higher levels of preterm birth than the rest of California (12.1% compared to 9.6% in CA in 2012)—but why? Preterm birth happens when babies are born too soon, before 37 weeks gestation, and factors including environmental pollution may contribute. We wanted to understand … Continue reading What causes so much preterm birth in Fresno County?