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  • Title: The effect of recurrent miscarriage and infertility on the risk of pre-eclampsia.
    Author: Trogstad L, Magnus P, Moffett A, Stoltenberg C.
    Journal: BJOG; 2009 Jan; 116(1):108-13. PubMed ID: 19087081.
    Abstract:
    OBJECTIVE: Pre-eclampsia, recurrent miscarriage and infertility may all partly be caused by unsuccessful placentation early in pregnancy. If so, one will expect these disorders to be associated in population studies. The aim of the present investigation was to estimate the risk of pre-eclampsia in women with recurrent miscarriage and infertility. DESIGN: Cohort study. SETTING: The Norwegian Mother and Child Cohort Study (MoBa), a large population-based pregnancy cohort. SAMPLE: The sample consisted of 20,846 singleton pregnancies to nulliparous women participating in the MoBa, 1999-2005. METHODS: Information on miscarriage, infertility and potential confounders was self-reported in postal questionnaires, whereas the diagnosis of pre-eclampsia was retrieved from the Medical Birth Registry of Norway. Risk estimation and confounder control was performed with multiple logistic regression. MAIN OUTCOME MEASURES: Pre-eclampsia according to history of miscarriage and infertility. RESULTS: An increased risk of pre-eclampsia, although not statistically significant, was found for women with recurrent miscarriages (adjusted OR 1.51, 95% CI 0.80-2.83). Women who had ever been treated for infertility also had increased risk (adjusted OR 1.29, 95% CI 1.05-1.60). When these two risk factors were combined, the adjusted odds ratio for pre-eclampsia was 2.40 (95% CI 1.11-5.18). CONCLUSIONS: The study supports the hypothesis that infertility, recurrent miscarriage and pre-eclampsia share elements of the same aetiological factors.
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