Long-term exposure to low-level radiation is likely cause, researchers say

Doctors at several leading U.S. cancer hospitals say most women should get exams starting at 40, not 45

Parents should set guidelines

For starters, use less energy at home

Study cites problems with availability, affordability

Sperm retrieval might help injured servicemen have children in the future, study says

Injectable toxin helped thwart atrial fibrillation, researchers report

Injectable toxin helped thwart atrial fibrillation, researchers report

High-dose therapy showed same survival rates as longer course of standard radiation

Pregnancy, live birth rates from older and younger women appear comparable