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  • Title: Cytomegalovirus antibody status at 17-18 weeks of gestation and pre-eclampsia: a case-control study of pregnant women in Norway.
    Author: Strand KM, Odland ML, Iversen AC, Nordbø SA, Vik T, Austgulen R.
    Journal: BJOG; 2012 Oct; 119(11):1316-23. PubMed ID: 22804776.
    Abstract:
    OBJECTIVE: To assess the association between maternal cytomegalovirus (CMV) antibodies in mid-pregnancy and pre-eclampsia. DESIGN: Nested case-control study. SETTING: Pregnancies registered in the Norwegian Mother and Child Cohort Study (MoBa): a large population-based pregnancy cohort (1999-2006). SAMPLE: A cohort of 1500 women with pre-eclampsia and 1000 healthy pregnant women. METHODS: Plasma samples and pregnancy-related information were provided by the MoBa. Antibody status (CMV IgG and CMV IgM) and levels (CMV IgG) at 17-18 weeks of gestation were determined by enzyme-linked immunosorbent assay (ELISA). MAIN OUTCOME MEASURE: A diagnosis of pre-eclampsia, as defined in the Medical Birth Registry of Norway. RESULTS: There was no evidence of an effect of CMV IgG seropositivity on the likelihood of developing pre-eclampsia, and CMV IgG antibody levels among women who were seropositive did not differ between groups. Adjusted for maternal age, parity and smoking, the odds ratio for pre-eclampsia in women seropositive for CMV IgG was 0.89 (95% CI 0.74-1.05; P = 0.17). The proportions of women who were seropositive for IgM did not differ between women with pre-eclampsia and women who were healthy (P = 0.98). Among nulliparous women, the proportion of women who were seropositive for CMV IgG was slightly lower among women with pre-eclampsia (53.5%) than among healthy women (59.8%) (P = 0.03). Subgroup analyses were performed for women with early or late onset pre-eclampsia, with preterm delivery and/or with neonates that were small for gestational age, but antibody status did not differ between pre-eclampsia subtypes and controls. CONCLUSIONS: The presence of maternal antibodies to CMV was not associated with pre-eclampsia in our study. The results suggest that CMV infection is unlikely to be a major cause of pre-eclampsia.
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