Complex sentence: In both cases, even though they are invasive, they are considered safe and these tests are able to determine if the fetus has any chromosomal abnormalities, and can therefore, detect the presence of a monosomy at 9p in the genome of the fetus.
Split into simpler sentences: In both cases, even though they are invasive, they are considered safe. These tests are able to determine if the fetus has any chromosomal abnormalities, and can therefore, detect the presence of a monosomy at 9p in the genome of the fetus.