A family is in shock after a 28-year-old woman, who was pregnant with twins, died from a rare heart condition.
Police responded to a call for help on West Kennett Road in Pontiac on Sunday.
Paramedics were already at the location performing CPR on the pregnant woman, who was found unresponsive.
She was transported to McLaren Hospital.
Despite the effort to save her, the woman and her two unborn babies were pronounced dead at the hospital.
Police say there was no obvious signs of foul play and the woman did not have any unusual medical history.
On Monday, the Oakland County Medical Examiner performed an autopsy and discovered the woman died from an enlarged heart, a condition known as paripartum cardiomyopathy.
Peripartum cardiomyopathy makes the heart muscle weak. It's a rare but serious condition that occurs during the final month of pregnancy, according to hopkinsmedicine.org.