Hyperhomocysteinemia and recurrent early pregnancy loss: A meta-analysis

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Abstract

Objective: To quantify the risk of recurrent early pregnancy loss in the presence of elevated fasting or afterload homocysteine concentrations or homozygosity for the 677C→T mutation in the methylenetetrahydrofolate reductase (MTHFR) gene (T/T genotype). Design: Case-control studies published between January 1992 and November 1999 were identified with a MEDLINE-search. These studies were combined with a recent case-control study performed by our own research group. Setting: Academic research environment. Patient(s): Studies published in the English language, concerning two or more pregnancy losses before 16 weeks' menstrual age were included. Intervention(s): Meta-analysis of all of the studies included. Main Outcome Measure(s): The number of subjects with and without hyperhomocysteinemia or with the T/T genotype were derived, if necessary the study was supplemented by personal communication with the original authors. Result(s): Pooled risk estimates of 2.7 (1.4 to 5.2) and 4.2 (2.0 to 8.8) were calculated for fasting and afterload plasma homocysteine concentrations, respectively. For the MTHFR T/T genotype a pooled risk estimate of 1.4 (1.0 to 2.0) was found. Conclusion(s): These data support hyperhomocysteinemia as a risk factor for recurrent early pregnancy loss. Further research should be focused on the pathophysiology of this relationship and on the clinical efficacy of B vitamin supplementation. Copyright (C) 2000 American Society for Reproductive Medicine.

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APA

Nelen, W. L. D. M., Blom, H. J., Steegers, E. A. P., Den Heijer, M., & Eskes, T. K. A. B. (2000). Hyperhomocysteinemia and recurrent early pregnancy loss: A meta-analysis. Fertility and Sterility, 74(6), 1196–1199. https://doi.org/10.1016/S0015-0282(00)01595-8

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