Cardiovascular Impacts of Reproductive History

Reproductive events across a woman’s life course exert lasting influence on cardiovascular health. Factors such as the number of pregnancies and live births, age at first birth and pregnancy complications contribute both independently and interactively to later‐life risk of hypertension, coronary heart disease and stroke. Physiological adaptations during gestation—including changes in blood volume, vascular tone and metabolic demands—may confer transient benefits or impose enduring stresses on the maternal cardiovascular system. Conversely, adverse placental syndromes can reveal underlying predispositions or drive vascular remodelling that persists beyond pregnancy. Understanding these complex relationships is essential for individual risk stratification, targeted prevention and development of postnatal surveillance guidelines worldwide.

Research from Nature Portfolio

Large‐scale analyses have illuminated parity as a non‐linear determinant of cardiovascular mortality. A comprehensive meta‐analysis of nearly one million women from prospective cohorts reported that ever bearing children was associated with a reduced risk of cardiovascular death, with the greatest benefit observed at four live births. In contrast, a separate population study of over twenty thousand middle‐aged and older Chinese women identified a positive association between higher parity and coronary heart disease, implying that cultural, genetic or lifestyle factors may modify the parity–risk relationship. Together, these foundational investigations highlight that the impact of childbearing on cardiovascular outcomes varies by population context and parity pattern, and they underscore the need to explore underlying haemodynamic and metabolic mechanisms.

Cardiovascular Impacts of Reproductive History publication trend

The graph below shows the total number of articles in cardiovascular impacts of reproductive history across all publications each year (not limited to Nature Index journals).

Technical terms

Parity: The number of times a woman has carried pregnancies to viable gestational age.

Nulliparous: Describing a woman who has never given birth to a live infant.

Preeclampsia: A hypertensive disorder of pregnancy characterised by high blood pressure and proteinuria after 20 weeks’ gestation.

Haemodynamic: Relating to the dynamics of blood flow within the circulatory system.

Dose–response: A relationship in which a change in exposure level corresponds to a change in effect size.

Placental syndrome: A spectrum of pregnancy disorders arising from abnormal placental development or function, such as gestational hypertension and intrauterine growth restriction.

References

1. Placental syndromes and maternal cardiovascular health. Clinical Science (2023).
2. Parity and Cardiovascular Disease Mortality: a Dose-Response Meta-Analysis of Cohort Studies. Scientific Reports (2015).
3. Parity and Risk of Coronary Heart Disease in Middle-aged and Older Chinese Women. Scientific Reports (2015).
4. The impact of parity on life course blood pressure trajectories: the HUNT study in Norway. European Journal of Epidemiology (2018).
5. Number of parity/live birth(s) and cardiovascular disease among Iranian women and men: results of over 15 years of follow-up. BMC Pregnancy and Childbirth (2021).