What does amniocentesis involve?

Amniocentesis is a medical procedure utilized primarily in prenatal diagnosis, and it consists of withdrawing amniotic fluid from the amniotic sac surrounding a developing fetus. This process is performed using a thin needle, which is inserted through the abdominal wall and into the uterus, guided by ultrasound to ensure accuracy and safety. The fluid extracted contains fetal cells that can be analyzed for genetic disorders and other conditions.

Choosing the option about withdrawing fluid through a needle puncture accurately describes this procedure as it highlights the minimally invasive nature of amniocentesis, which does not require major or open incisions. The other options do not appropriately represent the technique involved in amniocentesis. For instance, mentioning incisions implies a much more invasive surgical approach that is not characteristic of this specific procedure, which aims to minimize risk to both the mother and fetus while obtaining necessary fluid for analysis.