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  • Title: A comparison of the miscarriage rate between women with and without polycystic ovarian syndrome undergoing IVF treatment.
    Author: Liu L, Tong X, Jiang L, Li TC, Zhou F, Zhang S.
    Journal: Eur J Obstet Gynecol Reprod Biol; 2014 May; 176():178-82. PubMed ID: 24680396.
    Abstract:
    OBJECTIVE: To investigate if patients with polycystic ovary syndrome (PCOS) who conceived via IVF treatment had a higher miscarriage rate than non-PCOS subjects after controlling for several important confounding variables relating to pregnancy loss. STUDY DESIGN: A retrospective, observational, cohort study including a consecutive series of 564 embryo transfer cycles from PCOS patients and 7494 embryo transfer cycles from non-PCOS patients. Only the first pregnancy arising from IVF treatment was included for subsequent analysis. None of the subjects underwent ovarian diathermy or drilling prior to IVF treatment. Low dose (≤1000mg daily), short term (≤3 weeks) metformin therapy was used in 50 of the 301 PCOS subjects included in the study. RESULTS: After controlling for the number of embryo transferred, the type of embryos transferred (fresh or frozen-thawed), and the stage of embryo development at the time of transfer, women with PCOS had a consistently higher biochemical pregnancy rate than women without PCOS (fresh single day 3 embryo transfer, 46.7% (7/15) vs. 14.5% (27/186), respectively, p<0.05; frozen-thawed single day 3 embryo transfer, 25.9% (7/27) vs. 6.1% (11/181), p<0.05; fresh double day 3 embryo transfer, 17.1% (12/70) vs. 7.6% (95/1256), p<0.05; frozen-thawed double day 3 embryo transfer, 7.9% (15/189) vs. 3.4% (66/1968), p<0.05). There was no significant difference in the clinical miscarriage rate between the two groups of subjects. CONCLUSION: PCOS patients who conceived following IVF treatment had higher biochemical loss than women without PCOS, but the clinical miscarriage rate was no different between the two groups.
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