Acyclovir and Ganciclovir are antiviral medications. Both medications have a key side effect of nephrotoxicity. Ganciclovir can also cause bone marrow suppression (anemia, neutropenia, thrombocytopenia).
During amniocentesis, alpha-fetoprotein (AFP) levels are measured. HIGH levels of AFP are associated with neural tube defects. LOW levels of AFP are associated with chromosomal disorders (such as Down Syndrome).