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    The Genetics and Epidemiology of Reproductive Disorders

    Ryckman, Kelli Kae
    : https://etd.library.vanderbilt.edu/etd-01142009-105542
    http://hdl.handle.net/1803/10423
    : 2009-01-14

    Abstract

    Each year in the United States about one million (17%) of all pregnancies experience complications that result in fetal loss. Of the five million pregnancies that end in a live birth approximately 12% are born prematurely. Vaginal disorders and infections during pregnancy, particularly bacterial vaginosis (BV), are known risk factors for both miscarriage and preterm birth (PTB). Identifying the environmental and genetic risk factors for these complex reproductive disorders is important for improving health through better diagnostic methods and treatments. The purpose of this project is to examine the genetics and epidemiology of BV and PTB as examples of complex reproductive disorders. Cervical immunity clearly plays an important role in the pathogenesis and progression of BV. Therefore, cervical cytokine concentrations were measured during the first trimester of pregnancy in BV positive (BV+) and BV negative (BV-) women. Genetic associations between cytokine receptor genes and cervical cytokine concentrations were identified and discovered to differ by both BV status and race. The genetics of PTB was examined by genotyping approximately 1500 single nucleotide polymorphisms (SNPs) from 160 genes involved in preterm pathways, including decidual hemorrhage, infection and inflammation, activation of the hypothalamic-pituitary-adrenal axis, and uterine distention. SNPs in both the decidual hemorrhage and infection/inflammation pathways were associated with PTB. Additionally, many of these associations corroborate results from a previous association study.
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