American Heart Association Oct 6 2025 Cardiovascular-related health problems may occur in as many as 1 out of every 7 pregnancies, even among people who don't already have heart disease, according to new research published today in the American Heart Association's flagship journal Circulation. A review of more than 56,000 pregnancies occurring between 2001 and 2019 within the Mass General Brigham health care system in New England found a steady rise in cardiovascular-related complications