Nidellia, I did amnio for #2, the doc who did it specializes in doing amnio and she was very skillful and careful as well. I could see the process on screen if I wanted to but I preferred not to. They use a needle to extract fluid to do a 100% test which is accurate and you can even know your baby's sex if you want to. It's invasive test, not painful at all surprisingly and was very fast, in and out. After that, they will need you to have full bed rest for 3 days, don't do anything at all if you can help it and move slowly and carefully.
I may have to do this too but I'm intending to ask doctor is Materni-T 21 blood test is available. I heard it is just blood test, 99% accurate and non invasive and the latest as oppose to CVS and Amnio. I'm not sure if Materni-T 21 is available in Singapore but I'll try asking your gynae if I were you to have other options too, and apparently, you can also do Materni-T 21 earlier than 16 weeks.