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Prenatal Diagnosis
Start of Term Paper
Also known as a sonogram, an ultrasound reflects sound waves off of the fetus and then is shown on a special computer screen. This test is not very clear and physical features such as limb, heart, brain, and spine abnormalities can't be seen un .... Middle of Term Paper
... into the early placenta. A small sample of chorionic villi is removed and taken for laboratory testing. The chorionic villi has the same genetic makeup as the fetus because it is of fetal origin. Chorionic villus sampling will detect up to 99% of chromosome abnormalities. Some follow-up ultrasounds are recommended at 16 weeks of pregnancy. The amount of risk is the same as in amniocentesis.
Amniocentesis
Amniocentesis is performed at 15-20 weeks of pregnancy. It will detect chromosome abnormalities and other certain genetic disorders. This test can detect up to 95% of neural tube disorders such as spina bifida. It is done by insertin ... |
| Number of Words: 439 |
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