Which prenatal diagnostic procedure involves extracting a small sample of amniotic fluid surrounding the fetus to test for chromosomal abnormalities?

Alpha-fetoprotein test, sonography, MRI, and amniocentesis are some of the tools used to screen or identify developmental anomalies and multiple disabilities at which stage?

A prenatal diagnostic technique in which a small tube with a light source is inserted into the uterus to directly inspect the fetus for defects of the limbs and face is called: