Coronis

In Greek mythology, Coronis is a Thessalian princess and a lover of the god Apollo. She was the daughter of Phlegyas, king of the Lapiths, and Cleophema. By Apollo she became the mother of Asclepius, the Greek god of medicine. While she was still pregnant, she slept with a mortal man named Ischys and was subsequently killed by either the god or his sister Artemis for her betrayal. After failing to heal her, Apollo rescued their unborn child by performing a caesarean section. She was turned into a constellation after her death.