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Laboratory Test Reference Guide

Laboratory Information

Test Name

Maternal serum screen T1


MSS1, Antenatal Screening for Down Syndrome ...

External Price (excl. GST)


Price Comment

First and second trimester screens are paid for by the Ministry of Health National Screening Unit. The patient is entitled to one or the other. If a fully integrated screen, first trimester, NT plus second trimester is required there is a cost of $190 +

Specimen Collection

Pre Testing Requirements

First trimester combined test is blood test plus Nuchal Translucency (NT). Blood must be taken between 9 weeks and 13 weeks 6 days gestation.

Sample MUST be accompanied by the MOH form, "Antenatal Screening for Down Syndrome ..." (FORM CC6533)

Specimen Collection and Transport Protocols

Separate serum within 4 hours of collection. Freeze serum then send sample frozen.

Adult Specimen

2 x 3ml SST

Sample Delivery to Lab

Freeze serum then send sample frozen.

Test Information


Sendaway - Biochemistry

Test Availability

Mon -Fri, 0800-1630


Sendaway - Refer to external testing laboratory report

Unit of measurement

Refer to report

Uncertainty of measurement

Refer to report

Additional Information

 LabPlus Test Information

Paper reports issued directly to referring health professional

Referred Out


Form required available from:    http://www.labplus.co.nz/clinical-resources/ads-form/

Electronic Information

Registration Code


HL7 mapping code