What prenatal technique uses a long, hollow needle to extract amniotic fluid to examine the foetus's genotype?

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Amniocentesis is the prenatal technique that uses a long, hollow needle to extract amniotic fluid surrounding the foetus to examine the foetus's genotype. The technique is commonly used to detect genetic disorders such as Down syndrome and cystic fibrosis. Chorionic villus sampling is another prenatal technique that involves removing a small sample of placental tissue, while alpha-fetoprotein is a blood test used to screen for neural tube defects. Ultrasound is a prenatal imaging technique that uses high-frequency sound waves to produce images of the developing foetus.

What Prenatal Technique Uses a Long, Hollow Needle to Extract