alexa Reference standard for serum bile acids in pregnancy.
Infectious Diseases

Infectious Diseases

Journal of AIDS & Clinical Research

Author(s): Egan N, Bartels A, Khashan AS, Broadhurst DI, Joyce C, , Egan N, Bartels A, Khashan AS, Broadhurst DI, Joyce C,

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Abstract OBJECTIVE: Obstetric cholestasis (OC) is a liver disorder characterised by pruritus and elevated serum bile acids (SBA) that affects one in 200 pregnant women. It is associated with adverse perinatal outcomes such as premature delivery and stillbirth. Mild OC is defined as SBA levels of 10-39 μmol/l, and severe OC is defined by levels >40 μmol/l. SBA levels in normal pregnancy have not been investigated. We aimed to establish reference values for SBA in healthy pregnant women across different trimesters of pregnancy. DESIGN: Cross-sectional analysis of SBA levels. SETTING: A large tertiary referral university teaching maternity hospital. POPULATION: Healthy pregnant women with a singleton pregnancy and a body mass index (BMI) < 40, excluding women with significant alcohol intake, history of liver disease, prior cholecystectomy and OC. METHODS: Cross-sectional analysis of SBA levels at 12, 20, 28 and 36 weeks of gestation, and on days 1-3 postpartum. MAIN OUTCOME MEASURES: SBA levels in μmol/l. RESULTS: A total of 219 women attending for antenatal care were recruited, and SBA levels were assayed at 12, 20, 28 and 36 weeks of gestation, and up to 72 hours postpartum (n = 44-49 cases at each stage). The majority were white European women, with a median age of 30 years (range 17-46 years) and median BMI of 25 (range 18-38). Values of SBA ranged from 0.3 to 9.8 μmol/l in 216 women, with only three measurements outside this range. There were no significant changes throughout pregnancy. CONCLUSIONS: SBA values in uncomplicated pregnancies are consistent, regardless of gestation, and are not elevated in pregnancy. The current reference values for the diagnosis of OC appear to be appropriate. © 2012 The Authors BJOG An International Journal of Obstetrics and Gynaecology © 2012 RCOG. This article was published in BJOG and referenced in Journal of AIDS & Clinical Research

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