The Cardiovascular Countdown: How Stress Amplifies Pregnancy’s Heart Health Risks

Individuals who navigate pregnancy-related challenges, such as preeclampsia, premature birth, intrauterine fetal demise, or delivering an infant with a low birth weight for their gestational age, might encounter an augmented susceptibility to cardiovascular ailments later in life. Furthermore, a heightened prevalence of elevated blood pressure has been observed in those reporting substantial stress levels during and following gestation, persisting for several years post-delivery, as indicated by novel findings published in the esteemed journal Hypertension, a publication of the American Heart Association.

Our investigation revealed that for women experiencing their initial pregnancy complicated by adverse outcomes, elevated stress trajectories over time correlated with increased blood pressure readings 2 to 7 years post-delivery. This suggests a potential vulnerability among women with pregnancy complications, rendering them more susceptible to the detrimental cardiovascular consequences of stress. Consequently, implementing strategies to effectively manage and alleviate stress could prove instrumental in safeguarding long-term cardiac well-being.

Virginia Nuckols, Ph.D., lead author of the research and a postdoctoral fellow within the Department of Kinesiology and Applied Physiology at the University of Delaware

Throughout a woman’s lifespan, stressful life occurrences and the subjective perception of stress have been demonstrably linked to the development of cardiovascular issues. Pregnancy, inherently, is characterized by intensified psychosocial pressures, which can precipitate elevated cardiovascular risks and amplify the likelihood of adverse pregnancy outcomes, or complications arising during gestation and/or parturition. Consistent with guidance from the American Heart Association, hypertension occurring during pregnancy can exert enduring influences on maternal health, underscoring the critical importance of postpartum care for managing and mitigating the potential for complications.

This particular study aimed to ascertain whether levels of psychosocial stress experienced during a woman’s initial pregnancy and the subsequent years influence her blood pressure and the risk of developing hypertension. Moreover, it sought to determine if specific complications encountered during pregnancy and delivery modulate the association between stress levels and cardiovascular health.

The research methodology involved the precise measurement of maternal blood pressure and stress indices during both the first and third trimesters of gestation, with re-evaluation conducted 2 to 7 years following childbirth.

The comprehensive analysis yielded the following key findings:

• Among women who experienced adverse pregnancy outcomes, a higher cumulative level of stress was correlated with blood pressure readings that were, on average, 2 mm Hg greater than those in the low-stress cohort during the 2-to-7-year post-delivery period. This association, however, was not observed in women who did not encounter adverse pregnancy outcomes.
• Individuals reporting moderate to severe stress levels tended to be younger (aged approximately 25 to 27 years), exhibited a higher body mass index, and possessed lower levels of formal education.
• The study’s results strongly indicate that women who have experienced adverse pregnancy outcomes may exhibit a heightened susceptibility to the protracted detrimental effects of stress on their cardiac health.

The study’s principal investigators acknowledged that the precise mechanisms by which elevated stress contributes to higher blood pressure in women with a history of pregnancy complications remain elusive, likely involving a multifactorial interplay of physiological and psychological elements. “Future research endeavors should rigorously investigate the underlying reasons why women with a history of adverse pregnancy outcomes might be more prone to stress-induced elevations in blood pressure and critically evaluate whether interventions designed to reduce stress can effectively diminish cardiovascular risk for this population,” stated Dr. Nuckols.

Hypertension during pregnancy carries the potential for enduring adverse impacts on maternal well-being, encompassing conditions such as preeclampsia, eclampsia, cerebrovascular accidents, or renal dysfunction, as detailed in the American Heart Association’s 2025 Guideline for the Prevention, Detection, Evaluation and Management of High Blood Pressure in Adults. Diligent monitoring of blood pressure parameters before, during, and after the gestational period is paramount for the proactive prevention and amelioration of long-term health sequelae.

“The present guideline places significant emphasis on post-adverse pregnancy event blood pressure surveillance, and our findings suggest that the assessment and management of stress could also represent a vital strategy for mitigating long-term cardiovascular risk in these women,” remarked Nuckols. “The observed disparities in blood pressure among women reporting higher perceived stress levels were evident even in young women, averaging around 25 years of age. Although these blood pressure variations were modest, approximating 2 mm Hg, even slight increases can exert a cumulative influence on the risk of heart disease over time.”

“This research underscores the profound interconnection between mental and cardiac states, highlighting the essential role of stress management, particularly for individuals who have navigated adverse pregnancy experiences,” commented Laxmi Mehta, M.D., FAHA, chair of the American Heart Association’s Council on Clinical Cardiology. “From a clinical care perspective, it reinforces the imperative for healthcare providers to proactively ascertain and address stress as an integral component of the comprehensive care provided to our patients. Further investigation into whether targeted interventions aimed at stress reduction or management can yield a meaningful impact on long-term cardiovascular outcomes will be of considerable importance.” Dr. Mehta, who was not directly involved in this particular study, also holds the positions of director of preventative cardiology & women’s cardiovascular health, the Sarah Ross Soter Endowed Chair in Women’s Cardiovascular Health Research, and professor of internal medicine at The Ohio State University Wexner Medical Center.

The current study is not without its inherent limitations. Specifically, the assessment of stress levels relied on participants’ subjective perceptions, thereby precluding the researchers from fully characterizing other aspects of the stress experience, such as prevailing mood states or somatic symptoms, which could independently influence health. Furthermore, perceived stress scores were not systematically collected during the second trimester of pregnancy, being limited to the first and third trimesters. It is also conceivable that distinct individual or combined forms of adverse pregnancy outcomes (for instance, concurrent preeclampsia and delivering a neonate small for gestational age) might exert differential influences on stress trajectories or blood pressure profiles. Additionally, the cohort examined comprised exclusively women during their initial pregnancy. Subsequent research will be essential to comprehensively elucidate the intricate links between stress and cardiovascular health following an adverse pregnancy event.

Details regarding the study’s design, context, and methodology:

• Researchers meticulously analyzed the medical records of 3,322 first-time mothers, aged between 15 and 44 years (with an average age of 27), who had no pre-existing history of hypertension prior to pregnancy. This data was sourced from the Nulliparous Pregnancy Outcomes Study: Monitoring Mothers-to-be (nuMoM2b), a study encompassing a population characterized by significant racial, ethnic, and geographical diversity. According to the study’s authors, 66% of participants self-identified as Caucasian, 14% as Hispanic, and 11% as Black women.
• Participants were recruited from 17 distinct medical centers situated across eight U.S. states. These women were either pregnant with their first child or carrying a single fetus.
• The research team closely monitored the women throughout their first trimester, subsequently correlating this information with the incidence of adverse pregnancy outcomes. These adverse outcomes encompassed a range of conditions, including preeclampsia (the new onset of elevated blood pressure during pregnancy), preterm birth, the delivery of an infant weighing less than expected for their gestational age, and stillbirth.
• All participants completed the Perceived Stress Scale, a validated instrument designed to quantify the extent to which various life situations trigger feelings of stress and the subjective perception of its intensity. This assessment tool employs questions that gauge an individual’s thoughts and feelings over the preceding month. Participants administered this assessment during their first and third trimesters of pregnancy, as well as 2 to 7 years post-delivery. They were prompted to indicate the frequency with which they encountered situations they deemed uncontrollable, unpredictable, or overwhelming within the preceding month, utilizing a five-point Likert scale, where higher scores signified elevated levels of perceived stress.