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[Changes in active and inactive renin throughout pregnancy].
Nihon Sanka Fujinka Gakkai Zasshi
|July 1, 1985
Summary
Pregnancy significantly alters renin levels, with inactive renin peaking early and active renin rising throughout gestation. Both return to normal postpartum, highlighting dynamic hormonal regulation.
Area of Science:
- Endocrinology
- Reproductive Physiology
- Renal Physiology
Context:
- Limited data exists on active and inactive renin changes during pregnancy.
- Renin-angiotensin-aldosterone system (RAAS) plays a crucial role in cardiovascular and fluid balance.
- Pregnancy involves significant physiological adaptations, including RAAS modulation.
Purpose:
- To quantify changes in total, active, and inactive renin concentrations during pregnancy.
- To investigate the physiological roles of these renin forms throughout gestation and the puerperium.
- To establish baseline renin levels for comparison in pregnant and non-pregnant states.
Summary:
- Total renin levels during pregnancy are elevated, approximately double puerperal levels, with considerable individual variation.
- Inactive renin significantly increases in the first trimester (4x puerperal levels) and gradually declines, while active renin rises progressively, peaking in the third trimester.
- Postpartum, both active and inactive renin rapidly decrease to normal levels within days, indicating rapid hormonal adjustments.
Impact:
- Provides novel insights into the dynamic changes of active and inactive renin during pregnancy.
- Contributes to understanding the physiological regulation of the renin-angiotensin system in gestation.
- Establishes a reference for renin concentrations during pregnancy, aiding future research in hypertensive disorders of pregnancy.