Alan Barreca in USA Today: Climate Change Impact: Hot Temperatures Shorten Pregnancies, Study Suggests

The key finding was that birth rates spiked right around the days the temperature exceeded 90 degrees. After the hot weather passed, birth rates fell. “That’s enough to take somebody from what’s considered to be a pretty healthy pregnancy into a ‘we are somewhat worried’ pregnancy,” said Alan Barreca, a UCLA professor of environment and human health and lead author of the new study.