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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Schlattmann, Peter / Tate, Jillian R.


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Analytical performance of a new two-step ADVIA Centaur® estradiol immunoassay during ovarian stimulation

Catherine Massart1 / Jacqueline Gibassier2 / Marie-Christine Laurent3 / Dominique Le Lannou4

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Corresponding author: Catherine Massart, Laboratoire de Génétique Moléculaire et Hormonologie, CHU de Pontchaillou, rue Le Guilloux, 35043 Rennes, France Fax: +33-299-284-145,

Citation Information: Clinical Chemical Laboratory Medicine. Volume 44, Issue 1, Pages 105–109, ISSN (Online) 1437-4331, ISSN (Print) 1434-6621, DOI: 10.1515/CCLM.2006.020, January 2006

Publication History

Received:
August 18, 2005
Accepted:
October 18, 2005

Abstract

Measurement of estradiol is useful in women undergoing ovarian stimulation for in vitro fertilization and embryo transfer (IVF-ET). The analytical performance of a new two-step estradiol assay (ADVIA Centaur® estradiol-6 III from Bayer Diagnostics) was evaluated in 41 sera from 11 women undergoing ovarian stimulation. The results were compared to those obtained with two radioimmunoassays (RIAs; RIA Estradiol Immunotech IM 1663 from Beckmann Coulter and Coat-A-Count Estradiol from Diagnostic Products Corporation) and with one chemiluminescent immunoassay (CLIA; ADVIA Centaur® estradiol-6). The ADVIA Centaur® estradiol-6 III assay was the most sensitive assay, with a functional sensitivity of 55 pmol/L. Within- and between-run coefficients of variation calculated for the new ADVIA Centaur® assay ranged from 3.3% to 9%, which was better than the precision obtained for the other assays. A dilution test showed serum interferences when estradiol was measured in non-diluted samples. No statistical difference was observed between the estradiol results obtained in diluted sera with the new two-step ADVIA Centaur® assay and those measured with the Immunotech RIA and the other CLIA. In conclusion, this new, two-step estradiol assay performed on the ADVIA Centaur® system displays suitable sensitivity, precision and intermethod agreement with the Immunotech RIA for the measurement of serum estradiol concentrations in women undergoing ovarian stimulation and IVF-ET. For correct linearity, estradiol measurement should be performed on diluted samples.

Keywords: estradiol; immunoassay; ovarian stimulation; sensitivity

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