Dana Jenn, age 40, wife and mother of four, had been using the NuvaRing for less than two months when she collapsed while walking on a treadmill as part of her marathon training. She was working out with her oldest daughter, Sarah, who said Jenn had difficulty breathing and then collapsed suddenly.

According to the medical examiner report, the cause of death was a “Pulmonary embolism due to or as a consequence of deep vein thrombosis.”