Amniocentesis is used for determining

Options

A. Heart diseases
B. Brain disease
C. Hereditary disease of embryo
D. All the above

Answer

### Step-by-Step Solution:

1. **Understanding Amniocentesis**: Amniocentesis is a medical procedure performed during pregnancy to collect amniotic fluid, which contains fetal cells and various substances.

2. **Purpose of Amniocentesis**: The primary purpose of this procedure is to conduct prenatal diagnosis. This means it is used to detect potential genetic and chromosomal disorders in the developing fetus before birth.

3. **Conditions Detected by Amniocentesis**: The procedure can identify various hereditary diseases and chromosomal abnormalities, such as Down's syndrome. It helps in determining if the fetus is at risk for certain genetic conditions.

4. **Procedure**: During amniocentesis, a thin needle is inserted through the abdominal wall into the uterus to extract a small amount of amniotic fluid. This fluid contains fetal cells that can be analyzed for genetic conditions.

5. **Conclusion**: Given the options provided in the question (heart diseases, brain disease, hereditary disease of embryo, or all of the above), the most accurate answer is that amniocentesis is primarily used for determining hereditary diseases of the embryo.

### Final Answer:
**Amniocentesis is used for determining hereditary diseases of the embryo.**

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