These people have 1 normal son. No fetal blood analysis was done. These people have decided not to have a biochemical analysis done on the amniotic fluid. These people have 1 normal child and 1 child with Down's Syndrome. They are concerned about whether the next child will be affected.
Biochemical analysis reveals normal enzyme levels.
Analysis of the fetal blood shows that this fetus has sickle-cell anemia. As far as we know, this woman has been pregnant 7 times. She has had 3 miscarriages. Blood tests reveal both parents to be carriers of the Tay-Sachs gene. The newborn baby boy is perfectly normal and healthy.