Researchers are inching closer to creating human eggs and sperm in the lab that carry a full complement of anyone's DNA. It could revolutionize fertility treatment and raises huge ethical questions.

For decades researchers have struggled to find a contraceptive methods for males. A new fast-acting compound shows promise — assuming it turns out to work as well in men as in mice.

For decades birth control research focused on women. Now there's a new push to develop gels, pills or other products that could keep men from getting their partners pregnant.