Hum. Reprod. Advance Access published online on January 11, 2007
Human Reproduction, doi:10.1093/humrep/del497
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© The Author 2007. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Serum müllerian-inhibiting substance in Down's syndrome pregnancies
1 Maimonides Medical Center, Brooklyn, New York 2 Massachusetts General Hospital, Harvard Medical School, Boston, USA 3 University of Leeds Medical School, Leeds, UK
4 To whom correspondence should be addressed at: Leeds Screening Centre, Gemini Park, Sheepscar Way, Leeds LS7 3JB, UK. Tel.: +44 113 284 9233; Fax: +44 113 262 1658; E-mail: h.s.cuckle{at}leeds.ac.uk
BACKGROUND: To examine whether maternal serum levels of müllerian-inhibiting substance (MIS) differ in Down's syndrome and unaffected pregnancies.
METHODS: Casecontrol study was conducted using stored serum from an antenatal screening programme. Sera from 25 Down's syndrome pregnancies were retrieved from 20°C storage together with 125 unaffected controls individually matched for maternal age, weeks of gestation and duration of storage. Results were expressed in multiples of the gestation-specific median value (MoM) in controls.
RESULTS: The median value in Down's syndrome pregnancies was 0.83 MoM (P = 0.77, two-tail Wilcoxon rank sum test). Among unaffected pregnancies, there was a statistically significant correlation between MIS and pregnancy-associated plasma protein-A (P < 0.05). MIS levels were elevated in pregnancies where assisted reproduction techniques had been used.
CONCLUSION: There is no evidence for a substantial reduction in maternal serum MIS levels in Down's syndrome pregnancies. This study provides useful information regarding serum MIS levels in pregnancy.
Key words: antenatal screening/Down's syndrome/marker/MIS/ovarian reserve