Question | Answer |
What are chromosomes 1-22 are referred to as? | Karyotypes |
What is curvature of the 5th digit of hand reffered to as, and what is it associated with? | Clinodactyly, T21/Down's |
What is 3 complete sets of chromosomes referred to as? | Tripliody/Mosaic karyotype (not compatible with life |
Complete or partial absence of 2nd sex chromosome (female) | Turner's syndrome/X0 karyotype |
Trisomy 13 is also known as | Patau's syndrome |
What is an abnormal amount of chromosomes known as? | Aneuploidy |
What is Edward's syndrome? | Trisomy 18 |
A nuchal fold greater than 6 mm is indicative of | T21/Down's syndrome |
XXY | Klinefelter's syndrome (male, typically sterile) |
XYY | Not clinically significant, children may be sterile |
Consistent increased nuchal translucensy at neck is known as | Cystic hygroma |
Progression of cystic hygroma in to other tissues is known as | Hydrops |
Conjoined twins results from what? | Monozygotic twins that split on day 13+ |
What is a triangular projection of chorionic villi between 2 amniotic membranes known as? | Twin peak sign |
Malformed, anencephalic twin is perfused by normal twin instead of dying, occurs w/ vascular communication between twins through placenta | Acardiac twin/TRAP (twin reversed arterial perfusion) |
Parasitic twin, one twin found within abdomen of sibling | Fetus in fetu |
Absorption of non-viable fetus in twin gestation, may mimic subchorionic hemorrhage | Vanishing twin |
2 chorions and 2 amnions are associated with dyzygotic twins and monozygotic twins that divided on days ______ | Days 0-3 |
What is the only definite way to tell sonographically that twins are dizygotic? | Different sexes |
When monozygotic twins share a vascular supply and blood is shunted away from the donor twin and to the recipient twin | |