NURS 245 Lecture Notes - Lecture 3: Chorionic Villus Sampling, Fetal Alcohol Spectrum Disorder, Down Syndrome
Document Summary
Ex. lithium is taken to treat depression. The mother must come off of drugs 6 months before pregnancy. Teratogenic agents cause most damage in the first trimester of pregnancy. The absence of chemicals during pregnancy can just as much cause a genetic defect. Fetal alcohol syndrome - small head circumference, low nasal bridge, mental slowing or retardation, heart defects. To prevent genetic disorders, one can take extended family history pedigree for three generations and find out if they have genetic disorders. Testing both partners for autosomal recessive trait. Tay sach"s disease - a rare, inherited disorder that destroys nerve cells in the brain and spinal cord. 50% chance of transmitting genetic disorder to the next generation. The manifestations of the disorders could appear later in life. Testing during pregnancy of trisomy 21 (down syndrome) Chorionic villus sampling outside of amniotic sac.
