infertility

As more states outlaw abortion, some define human life as starting at fertilization. Some patients and health care workers worry that this could jeopardize in vitro fertilization treatments.

Most fertility treatments have been put on hold following recommendations by the American Society for Reproductive Medicine, but some specialists and their patients argue they can't afford to wait.

The twin birthrate nearly doubled between 1980 and 2014. Now it's going down among white mothers. What's behind the change?

A small study of teens who were conceived via assisted reproductive technology finds a significant number already have hypertension and premature "age-related changes" in their blood vessels.

Researchers disabled a gene that they think helps determine which human embryos will develop normally. The technique they used is controversial because it could be used to change babies' DNA.