Abstract
Recurrent miscarriage (RM) is a frequent obstetric problem. Its' pathophysiology is poorly understood. Infections, genetic, endocrine, anatomic and immunologic problems have been suggested as causes for RM. To evaluate the frequency of chromosomal abnormalities and 3 common thrombophilic mutations in couples with RM. A retrospective data collection was performed for the results of the cytogenetic analysis of the couples and Methylenetetrahydrofolate Reductase (MTHFR) C677T, Factor V Leiden (FVL) G1691A and Prothrombin (PTm) G20210A mutations of the mother in 142 couples suffering from RM. Prevalence of FVL, MTHFR, and PTm gene mutations were similar between cases shaving 2 or ≥3 abortions (P=0.528; P=0.233; P=0.375). In patients with FVL, MTHFR and PTm gene mutations, the OR's of having ≥3 abortions when compared to having 2 abortions were 1.515 (95% CI: 0.414-5.552), 0.573 (95% CI: 0.228-1.441), and 2.848 (95% CI: 0.355-22.871). All cases with PTm mutation had ≥3 abortions and all abortions occurred between 6-8 gestational weeks. Chromosomal abnormalities and thrombophilic mutations (especially PTm) seem to have an important role in RM. Additional larger studies involving investigation of more genes that may have a role in pregnancy are needed to assess this association.
Highlights
Recurrent miscarriage (RM) is defined as the occurrence of 3 consecutive first trimester pregnancy losses
A retrospective data collection was performed for the results of the cytogenetic analysis of the couples and Methylenetetrahydrofolate Reductase (MTHFR) C677T, Factor V Leiden (FVL) G1691A and Prothrombin (PTm) G20210A mutations of the mother in 142 couples suffering from RM
The study was approved by Non-Invasive Human Research Ethics Committee of Duzce University. 178 couples suffering from RM (≥2 pregnancy losses that occurred before the 20th gestational week) and admitted to the obstetrics and gynecology outpatient clinic, between January 2010 and August 2012 were retrospectively evaluated
Summary
Recurrent miscarriage (RM) is defined as the occurrence of 3 consecutive first trimester pregnancy losses. It affects 1% of all women [1]. Results: Prevalence of FVL, MTHFR, and PTm gene mutations were similar between cases shaving 2 or ≥3 abortions (P=0.528; P=0.233; P=0.375). In patients with FVL, MTHFR and PTm gene mutations, the OR’s of having ≥3 abortions when compared to having 2 abortions were 1.515 (95% CI: 0.414-5.552), 0.573 (95% CI: 0.228-1.441), and 2.848 (95% CI: 0.355-22.871). Conclusion: Chromosomal abnormalities and thrombophilic mutations (especially PTm) seem to have an important role in RM.
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