What is Quad Screening? Quad Screening is a prenatal test to determine the likelihood that a fetus (unborn baby) is affected with trisomy 21 (Down syndrome), trisomy 18, and certain types of birth defects (open neural tube defect or abdominal wall defects). Chromosome abnormalities (e.g. trisomy 21, trisomy 18) occur more frequently as a woman ages.
(From bottom left to bottom right) Michael Fishman as D.J. Conner, Sara Gilbert as Darlene Conner, Roseanne Barr as Roseanne Conner, John Goodman as Dan Conner and Sarah Chalke as Becky Conner. The following is a list of major characters in the television series Roseanne.
Deidre Hall. Deidre Ann Hall /diËdrÉ hÉËl/ (born October 31, 1947) is an American actress best known for her portrayal of Dr. Marlena Evans on NBC's daytime drama Days of Our Lives, which she has played for  40 years.