oscar test result low risk 35yrs old and above

my oscar was 1:10.. and guess what.. I was only 18 years old at that point of time. 🥲 not all 35 years and above will get high risk, although maternal age is one of the component in calculating risk but they also look into blood sample. There are two component to find in blood test to see if they are high as most DS cases show high amount in the mother’s blood. But I can’t remember the name or terms of those components.