ABSTRACT
Recurrent pregnancy loss (RPL) is a devastating reproductive problem affecting approximately
5% of couples trying to conceive. Genetic factors appear to be highly associated with
reproductive loss. In this article, genetic factors are reviewed in terms of random
numerical chromosome errors in miscarriage specimens and carriers of structural chromosome
rearrangements that may result in unbalanced chromosome errors in pregnancies. Recently,
research has generated interest in genetic markers for recurrent loss such as skewed
X-chromosome inactivation and human leukocyte antigen-G polymorphisms. Assisted reproductive
technologies (specifically, preimplantation genetic diagnosis) have been offered to
couples with recurrent pregnancy loss; however, more data need to be evaluated before
routine use can be advocated. Management of genetic factors in RPL should include
therapy based on the highest level of evidence, genetic counseling, and close monitoring
of subsequent pregnancies.
KEYWORDS
Recurrent pregnancy loss - recurrent miscarriage - cytogenetics - translocations -
preimplantation genetic diagnosis
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Mary D StephensonM.D.
Professor, Department of Obstetrics & Gynecology, Section of Reproductive Endocrinology
& Infertility, University of Chicago
5841 South Maryland Avenue (MC 2050), Chicago, IL 60637
Email: mstephen@babies.bsd.uchicago.edu