Heart-related health problems are increasingly affecting pregnancies, with new research revealing that as many as 1 in 7 pregnancies are impacted by cardiovascular complications. This statistic is especially concerning because many of the women affected have no prior history of heart disease. According to a study published in Circulation on October 6, 2025, the incidence of heart-related complications during pregnancy has been steadily increasing over the past two decades, highlighting a growing public health concern.
The research, conducted by a team led by Dr. Emily Lau, a cardiologist at Massachusetts General Hospital, analyzed data from more than 56,000 pregnancies between 2001 and 2019. The study’s results show a worrying trend of rising heart-related health risks, affecting not just women with pre-existing heart conditions but also those with no prior cardiovascular issues. This increase includes a range of complications such as heart attacks, strokes, blood clots, heart failure, high blood pressure, and in some cases, even maternal death.
Heart-Related Complications in Pregnancy
The study’s findings suggest that nearly 15% of pregnancies from 2001 to 2019 were affected by some form of cardiovascular complication. This is an alarming figure, as heart disease has become one of the leading causes of maternal morbidity and mortality worldwide. Researchers point out that heart complications are responsible for more than one-third of maternal deaths. In addition to heart disease, these complications also contribute significantly to other health issues in pregnant women, such as preterm births, gestational diabetes, and low birth weight.
Dr. Lau and her team conclude that pregnancy, from preconception to the postpartum period, presents a crucial window of opportunity for the implementation of primary prevention strategies. This includes addressing cardiovascular health early on to reduce the risks associated with these complications. Early intervention, they argue, could be vital in mitigating the rising rates of heart-related complications during pregnancy.
Risk Factors for Pregnancy-Related Heart Complications
The study also highlighted an increase in several cardiovascular risk factors during pregnancy, which may contribute to this troubling trend. Obesity, high blood pressure, elevated cholesterol, and diabetes all rose substantially in the study’s timeframe, and these conditions are known to increase the risk of heart disease.
- Obesity: One of the most striking increases was seen in obesity rates among pregnant women. In 2001, only 2% of pregnant women were classified as obese, but by 2019, this number had jumped to 16%. Obesity is a well-known risk factor for heart disease, as it can lead to hypertension, elevated cholesterol levels, and insulin resistance—all of which contribute to heart-related complications.
- High Blood Pressure: High blood pressure, or hypertension, is another significant risk factor. In 2001, only 3% of pregnancies were complicated by hypertension, but this number rose to 12% by 2019. Hypertension during pregnancy can lead to preeclampsia, a serious condition that can cause organ damage and even threaten the lives of both the mother and the baby.
- Elevated Cholesterol: Cholesterol levels also showed a concerning increase, from 3% in 2001 to 10% in 2019. Elevated cholesterol can contribute to the development of atherosclerosis, where fatty deposits build up in the arteries, narrowing them and increasing the risk of heart attacks and strokes.
- Diabetes: Diabetes, another risk factor for heart disease, increased from 1% to 3% during the same period. Pregnant women who develop gestational diabetes are at an increased risk of developing type 2 diabetes later in life, which can lead to long-term cardiovascular issues.
These findings underscore the need for greater awareness about cardiovascular risk factors before and during pregnancy. Many of these conditions are preventable through lifestyle changes such as improved diet, regular exercise, and weight management. However, the study found that many women are unaware that they are at risk for these conditions, and even fewer understand the potential consequences for their pregnancy and long-term health.
The Importance of Preconception Care and Proactive Health Management
Dr. Stacey Rosen, the volunteer president of the American Heart Association, emphasized the importance of preconception care. According to Dr. Rosen, understanding and addressing heart health before pregnancy is crucial. “If you’re planning to become pregnant, I strongly encourage you to connect with a clinician early to understand your risks and take steps to reduce them,” she said.
Starting before pregnancy and continuing into the postpartum period, women have valuable opportunities to make heart-healthy choices that can help reduce the risk of cardiovascular disease. Proactive management of risk factors, such as maintaining a healthy weight, controlling blood pressure, and managing cholesterol levels, can significantly lower the likelihood of complications during pregnancy.
Dr. Rosen also pointed out that the postpartum period is an often-overlooked phase when it comes to cardiovascular health. Many women focus on recovery after childbirth but neglect the importance of maintaining long-term health. The first year after giving birth is a critical time to continue heart-healthy practices, as women who experience complications during pregnancy are at higher risk for heart disease later in life.
Addressing Heart Health During Pregnancy
Pregnancy is a time of significant physical and emotional changes, and managing heart health during this period can be challenging. However, healthcare providers can play a key role in identifying women at risk and providing the necessary support. Early prenatal care visits allow doctors to screen for risk factors like high blood pressure, obesity, and elevated cholesterol. For women with pre-existing conditions, a tailored approach to managing their health throughout pregnancy is essential.
Pregnant women who are identified as high-risk can benefit from a multidisciplinary approach that includes guidance from cardiologists, obstetricians, and nutritionists. This approach can help ensure that women with cardiovascular risk factors receive the care they need to have a healthy pregnancy and avoid long-term health consequences.
Conclusion: A Call for Awareness and Prevention
The increasing number of pregnancies affected by heart complications is a concerning trend that requires urgent attention. Heart-related health problems not only affect the immediate well-being of mothers and babies but can also have long-term consequences for both. The study underscores the need for increased awareness, early intervention, and preventive care, both before and during pregnancy, to reduce the burden of heart disease.
As Dr. Rosen aptly stated, “During pregnancy, stay proactive about your health. Listen to your body and your provider to address any concerns that arise. And don’t overlook the postpartum period, which also carries important health considerations.” By making heart health a priority before, during, and after pregnancy, women can significantly improve their chances of having a healthy pregnancy and reducing their long-term risk for heart disease.
