Read the givenstatements and select the correct option.Statement 1:CVS...
CVS (chorionic villi sampling) is a technique for detecting foetal disorders during early pregnancy. In this technique, a doctor inserts a narrow, flexible tube the mother's vagina and cervix into the uterus and with chorionic villi from the placenta. The cells of chorionic villi are then examined for various disorders. Faster resulta advantage over amniocentesis. Another advantage is a CVS is done early, between 8th to 10th week of preganacy when abortion is safe for woman.
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Read the givenstatements and select the correct option.Statement 1:CVS...
CVS Technique and Amniocentesis
CVS or Chorionic Villus Sampling is a prenatal diagnostic technique used to detect genetic abnormalities in the fetus. It involves sampling the chorionic villi, which are tiny projections on the placenta that contain genetic material from the fetus. The procedure is done during the 8th to 10th week of pregnancy.
Amniocentesis is another prenatal diagnostic technique used to detect genetic abnormalities in the fetus. It involves sampling the amniotic fluid, which surrounds the fetus, and analyzing the genetic material present in it. The procedure is done during the 15th to 20th week of pregnancy.
Advantages of CVS over Amniocentesis
Statement 1 states that CVS technique is advantageous over Amniocentesis. This statement is correct because:
1. Early detection: CVS can be done during the 8th to 10th week of pregnancy, which is earlier than Amniocentesis. Early detection of genetic abnormalities allows parents to make informed decisions about the pregnancy and plan accordingly.
2. Faster results: CVS provides faster results than Amniocentesis. The results are available within a week, whereas Amniocentesis results take about two to three weeks.
3. Higher success rate: The success rate of CVS is higher than that of Amniocentesis. CVS can detect up to 99% of chromosomal abnormalities, whereas Amniocentesis has a detection rate of around 98%.
Statement 2
Statement 2 states that CVS is done during the 8th to 10th week of pregnancy when abortion is safe for a woman. This statement is also correct because:
1. Safe abortion: If the genetic test results indicate that the fetus has a severe genetic abnormality, the parents may choose to terminate the pregnancy. Abortion during the 8th to 10th week of pregnancy is generally considered safer than later stages of pregnancy.
2. Legal restrictions: In many countries, abortion is legal only up to a certain number of weeks of pregnancy. In India, for example, abortion is legal up to 20 weeks of pregnancy. Therefore, if the parents choose to terminate the pregnancy, it is important to do so within the legal time frame.
Conclusion
Both statements 1 and 2 are correct, and statement 2 is the correct explanation of statement 1. Therefore, the correct option is A.
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