Is the purpose of non-invasive genetic testing the same as amniocentesis?

Patient's question:

36, high-risk pregnancy, doctor recommended special examination

Doctor's answer:

Medical Analysis: Age 36, considered a high-risk pregnancy. The doctor recommends special project tests. The non-invasive genetic test you mentioned is another term for Down syndrome screening. Down syndrome screening primarily detects trisomy 21 syndrome and neural tube defects and can be performed in the early or middle stages of pregnancy.
Guidance: If the screening results indicate a high-risk condition, further prenatal diagnosis is necessary. Prenatal diagnosis aims to determine whether there are any chromosomal abnormalities to prevent the birth of a child with congenital mental retardation. Prenatal diagnosis involves amniocentesis or cord blood sampling.
Doctor's Inquiry: