Amniocentesis

Question 1

When is amniocentesis offered?

Answer 1

• High risk of fetal abnormality
• Women considered to be at high risk (>35 years old)

Question 2

When is amniocentesis usually performed?

Answer 2

16 weeks

Question 3

What is the risk of fetal loss?

Answer 3

0.5-1%

Question 4

How long does it take for the karyotype results to come back?

Answer 4

3 weeks.

Question 5

In how many cases is the karyoptype wrong and why?

Answer 5

1/1000

Due to maternal cells being present.

Question 6

What conditions may be diagnosed through amniocentesis?

Answer 6

• Neural tube defects (raised AFP levels in the amniotic fluid)
• Chromosomal disorders
• Inborn errors of metabolism