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Unexplained first trimester recurrent pregnancy loss and low venous reserves
Janneke Donckers1, Ralph R Scholten, Wim J G Oyen
1Department of Obstetrics and Gynecology, Radboud University Nijmegen Medical Centre, PO Box 9101, Nijmegen 6500 HB, The Netherlands. j.donckers@obgyn.umcn.nl
Human Reproduction (Oxford, England)
|July 6, 2012
Summary
Women with unexplained recurrent pregnancy loss (URPL) have significantly lower venous reserves, including plasma volume and venous compliance, compared to controls. These findings suggest potential targets for improving pregnancy outcomes.
Area of Science:
- Reproductive Medicine
- Cardiovascular Physiology
Background:
- Over half of recurrent pregnancy loss (RPL) cases remain unexplained.
- A history of unexplained RPL (URPL) may be linked to diminished venous reserve.
Purpose of the Study:
- To investigate whether women with URPL exhibit reduced venous reserve.
- To compare plasma volume and venous compliance between women with URPL and healthy controls.
Main Methods:
- A case-control study involving women with URPL and two control groups (healthy nulliparous and uncomplicated primiparous).
- Quantification of plasma volume (PV) and venous compliance (VC) in the forearm and calf.
- Measurement of mean arterial blood pressure and cardiac index (CI) to assess arterial demand.
Main Results:
- Women with URPL showed significantly lower mean PV (14-9%) compared to both control groups.
- Reduced venous compliance was observed in URPL women: VC(arm) was 25-32% lower, and VC(calf) was 29-22% lower than controls.
- Cardiac index was comparable across all groups, indicating similar arterial demand.
Conclusions:
- Women experiencing unexplained recurrent pregnancy loss have demonstrably lower venous reserves.
- Therapeutic strategies aimed at enhancing venous reserve could potentially improve pregnancy outcomes in this population.
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