What is amniocentesis ? Give its significance.

Explanation

### Step-by-Step Solution

**Step 1: Definition of Amniocentesis**
Amniocentesis is a medical procedure used to extract amniotic fluid from the amniotic sac surrounding a developing fetus. This fluid contains fetal cells and various substances that can be analyzed.

**Step 2: Purpose of Amniocentesis**
The primary purpose of amniocentesis is to study the chromosomal pattern of the fetus. By analyzing the chromosomes present in the amniotic fluid, healthcare providers can identify genetic defects or abnormalities in the developing fetus.

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