Answer: for trisomy triple marker test is performed to know more about chromosomal abnormalities in fetus. the result shows how risky is at fetus to have such abnormalities.
Triple marker test is the extension of double marker and looks for AFP, hCG, and Estriol.
AFP: alpha-fetoprotein is a protein that is produced by the fetus.
hCG: human chorionic gonadotropin is a hormone produced within the placenta
Estriol: estriol is an estrogen produced by both the fetus and the placenta
The triple screen test is performed between the 15th and 20th week of pregnancy. Low levels of AFP and abnormal levels of hCG and estriol may indicate that the developing baby has Trisomy 21, Trisomy 18 or another type of chromosome abnormality.
Answer: Trisomy ( down syndrome) is a genetic condition. The cause of down syndrome aslo know as trisomy 21.
Trisomy 18 is the second most common type of trisomy syndrome, after trisomy 21 ( down syndrome). The condition is even more common but many babies with trisomy 18 don't survive past the 2 or 3 trimester of pregnancy