Understanding Chorionic Villus Sampling (CVS) and Amniocentesis
Chorionic villus sampling (CVS) and amniocentesis are both prenatal testing procedures used to detect potential genetic disorders in a developing fetus. It is important to understand the differences between these two procedures in order to make informed decisions during pregnancy.
Chorionic Villus Sampling (CVS)
CVS is a procedure that involves taking a sample of the chorionic villi, which are tiny finger-like projections in the placenta that contain the same genetic material as the fetus. This procedure is typically done between 10-12 weeks of pregnancy and is used to diagnose genetic disorders such as Down syndrome, cystic fibrosis, and others.
Amniocentesis
Amniocentesis is a procedure that involves inserting a needle into the amniotic sac surrounding the fetus to collect a sample of the amniotic fluid. This procedure is usually performed between 15-20 weeks of pregnancy and is also used for genetic testing to detect chromosomal abnormalities and genetic diseases.
True Statement Regarding CVS and Amniocentesis
The correct statement regarding chorionic villus sampling (CVS) and amniocentesis is: C) CVS poses a higher risk of miscarriage than amniocentesis.
Explanation
Contrary to popular belief, both CVS and amniocentesis carry a risk of miscarriage. However, CVS poses a slightly higher risk compared to amniocentesis. It is important for expectant parents to weigh the benefits of prenatal testing against the potential risks involved.
Which of the following statements regarding chorionic villus sampling (CVS) and amniocentesis is true?
A) CVS is less invasive than amniocentesis.
B) Amniocentesis can be performed earlier in pregnancy than CVS.
C) CVS poses a higher risk of miscarriage than amniocentesis.
D) Amniocentesis is typically done for genetic testing, while CVS is done for gender determination.
Final answer:
The correct statement regarding chorionic villus sampling (CVS) and amniocentesis is: C) CVS poses a higher risk of miscarriage than amniocentesis. Both CVS and amniocentesis are prenatal testing methods, with CVS typically done between 10-12 weeks of pregnancy, and amniocentesis later at around 15-20 weeks.
Explanation:
Both tests are generally used to find chromosomal abnormalities or genetic illnesses rather than just determining gender.