Long term effects of parity on maternal autonomic function.

Area of Science:

• Cardiovascular Science
• Reproductive Health
• Autonomic Neuroscience

Background:

• Cardiovascular disease (CVD) risk factors in women are not fully understood.
• The specific impact of pregnancy history, including gravidity and parity, on autonomic function and subsequent CVD risk is unknown.

Purpose of the Study:

• To investigate the association between gravidity and parity with autonomic function in parous women.
• To determine if pregnancy history influences cardiovagal baroreflex sensitivity (BRS) and beat-to-beat blood pressure variability (BPV).

Main Methods:

• Autonomic function was assessed in 65 parous women 1-5 years post-normotensive pregnancy.
• Cardiovagal baroreflex sensitivity (BRS) and beat-to-beat blood pressure variability (BPV) were quantified.
• Statistical analyses examined associations between gravidity, parity, and autonomic measures, controlling for age and BMI.

Main Results:

• Gravidity showed a significant negative association with BRS, independent of age and BMI (β = -2.01, P = 0.003).
• A similar, though not statistically significant, trend was observed between higher parity and reduced BRS (β = -1.74, P = 0.06).
• Neither gravidity nor parity was associated with beat-to-beat blood pressure variability (BPV).

Conclusions:

• Pregnancy history, specifically gravidity and parity, is associated with reduced cardiovagal baroreflex sensitivity.
• These findings suggest a persistent and cumulative adverse effect of pregnancy on cardiac autonomic regulation in women.
• Further research is warranted to elucidate the mechanisms linking pregnancy history to long-term cardiovascular risk.