What is the next step after a cyst is discovered?
We can perform an amniocentesis, and count the number of chromosomes in the fetus to be certain there is not an extra copy of chromosome 18. At the same time, we can rule out other chromosomal abnormalities, such as Down syndrome, although we have no reason to suspect any of these in your case. However there is a small risk of amniocentesis causing a miscarriage.