After which week of gestation is amniocentesis used to determine sex-linked disorders?

After which week of gestation is amniocentesis used to determine sex-linked disorders?

• A. 10 weeks
• B. 14 weeks
• C. 28 weeks
• D. 30 weeks

Answer: (C)

Amniocentesis is a diagnostic procedure used to obtain amniotic fluid from the amniotic sac surrounding a developing fetus. This procedure is most commonly done after the 15th week of gestation, as this timeline allows for adequate fluid volume and reduces the risk to both the mother and the fetus. Using amniocentesis for determining sex-linked disorders is particularly relevant during the latter part of pregnancy, specifically around the 28 weeks mark, when it can provide crucial information regarding fetal development and genetic conditions. By this stage, enough fetal cells are present in the amniotic fluid, allowing for accurate genetic testing and the detection of chromosomal abnormalities, including sex-linked disorders such as hemophilia or Duchenne muscular dystrophy. While amniocentesis can be performed as early as 14 weeks, the accuracy and reliability of results are enhanced when conducted later, which is why the correct answer is the 28-week mark. This timeframe balances the need for timely information about the fetus's health and the safety of the procedure for both the mother and child.

Amniocentesis is a diagnostic procedure used to obtain amniotic fluid from the amniotic sac surrounding a developing fetus. This procedure is most commonly done after the 15th week of gestation, as this timeline allows for adequate fluid volume and reduces the risk to both the mother and the fetus.

Using amniocentesis for determining sex-linked disorders is particularly relevant during the latter part of pregnancy, specifically around the 28 weeks mark, when it can provide crucial information regarding fetal development and genetic conditions. By this stage, enough fetal cells are present in the amniotic fluid, allowing for accurate genetic testing and the detection of chromosomal abnormalities, including sex-linked disorders such as hemophilia or Duchenne muscular dystrophy.

While amniocentesis can be performed as early as 14 weeks, the accuracy and reliability of results are enhanced when conducted later, which is why the correct answer is the 28-week mark. This timeframe balances the need for timely information about the fetus's health and the safety of the procedure for both the mother and child.