• SafeT21 Express Xcelom - Advanced

safeT21express is a high sensitivity genetics analysis service for the non-invasive prenatal screening of Down syndrome and other disorders. safeT21 express is a test that analyses such circulating cell-free DNA molecules with next-generation DNA sequencing technologies and performs bioinformatics analysis. Genetic information from the unborn child can be obtained。

Test inclusive:
22 Trisomies
126 Microdeletion/Microduplication Syndromes
4 Sex Chromosome Aneuploidies

How the test is done?

 utilizes Next Generation Sequencing technique and bioinformatics analysis on both maternal DNA and cell-free placental DNA found in maternal blood. Compared to traditional screening methods based on nuchal translucency or maternal age,  is more sensitive, reliable, accurate and informative.


Pregnant women with a pregnancy of appropriate gestational age as below:

Singleton: >10 weeks

Twins/ Fetal reduction; >12 weeks

Triplets: >14 weeks


Standard Panel screens for 14 validated conditions.


Advanced Panel screens for chromosomal aneuploidies of all 23 pairs of chromosomes, including trisomies and the 126 microdeletions or microduplications with a minimum size of 3 Mb.


The test results and reports from both tests are signed by our medical technologists and will be reviewed by the professor from the Chinese University of Hong Kong.

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SafeT21 Express Xcelom - Advanced

  • Availability: In Stock
  • HKD: 7,900