Name the fluid from which foetal cells are obtained for chromosomal analysis.

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for the name of the fluid from which fetal cells are obtained for chromosomal analysis.

2. **Understand the Context**: During pregnancy, the fetus is surrounded by a protective sac filled with liquid. This liquid is crucial for the development of the fetus and is involved in various medical procedures.

3. **Name the Fluid**: The fluid that surrounds the fetus and is used for obtaining fetal cells is called **amniotic fluid**.

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