CNN: Warming temperatures put women at risk of giving birth early, study says

A study published in the Nature Climate Change journal found that birth rates increase by 5% on days where temperatures are above 90 degrees Fahrenheit, with an average reduction in gestational length of about 6.1 days. Due to higher temperatures, mothers face a greater risk of pregnancy complications including hypertension and preeclampsia. Nonetheless, the study still leaves many questions about the association and does not explain why extreme heat appears to lead to early births. Read the full article on CNN.com here.