Amnio and Prenatal diagnosis

Amnio noun - (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities.

Prenatal diagnosis and amnio are semantically related. In some cases you can use "Prenatal diagnosis" instead a noun "Amnio".

Prenatal diagnosis noun - Any of the diagnostic procedures used to determine whether a fetus has a genetic abnormality.

Amnio and prenatal diagnosis are semantically related. Sometimes you can replace term "Amnio" with "Prenatal diagnosis", this terms are similar.