alexa Preimplantation genetic diagnosis reduces pregnancy loss in women aged 35 years and older with a history of recurrent miscarriages.
Genetics & Molecular Biology

Genetics & Molecular Biology

Human Genetics & Embryology

Author(s): Munn S, Chen S, Fischer J, Colls P, Zheng X,

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Abstract OBJECTIVE: To determine whether preimplantation genetic diagnosis (PGD) and transfer of euploid embryos would decrease spontaneous abortion rates in recurrent miscarriage (RM) patients. DESIGN: Controlled clinical study. SETTING: In vitro fertilization centers and PGD reference laboratory. PATIENT(S): Recurrent-miscarriage patients with three or more prior lost pregnancies with no known etiology. INTERVENTION(S): Biopsy of a single blastomere from each day 3 embryo, followed by fluorescence in situ hybridization analysis. MAIN OUTCOME MEASURE(S): The rate of spontaneous abortions in RM subjects undergoing PGD were compared with [1] their own a priori expectations and [2] a comparison group of women undergoing PGD for advanced maternal age (> or =35 years). RESULT(S): Before PGD, RM patients had lost 87\% (262/301) of their pregnancies, with an expected loss rate of 36.5\%. After, they only lost 16.7\% pregnancies. This difference was mostly due to reduction in pregnancy loss in the > or =35-years age subgroup, to 12\% from an expected 44.5\%. CONCLUSION(S): Preimplantation genetic diagnosis aneuploidy screening has a beneficial effect on pregnancy outcome in RM couples, especially those in which the woman is aged > or =35 years. Our data indicate that PGD reduces the risk of miscarriage in RM patients to baseline levels. This article was published in Fertil Steril and referenced in Human Genetics & Embryology

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