How is the First Trimester Screening done?
First Trimester Screening test is a combination of a blood test and the ultrasound scan. The blood which drawn from the arm will use to measure the level of two hormones normally found in pregnant woman; free beta-subunit of human chorionic Gonadotrophin (free B-hCG) and Pregnancy Associated Plasma Protein-A (PAPP-A). From the ultrasound scanning, the Nuchal Translucency (fluid-filled space beneath the skin behind the neck ) marker will be measured. This combination tests is need for the screening of the three most common fetal chromosomal abnormalities, namely, Trisomy 21(Down’s Syndrome), Trisomy 18(Edward’s Syndrome), and Trisomy 13(Patau’s Syndrome).
