Which is non-invasive technique of genetic counseling ?

Options

A. Amniocentesis
B. Chorionic biopsy
C. Fetal blood sampling
D. Ultrasonography

Answer

**Step-by-Step Solution:**

1. **Understanding Non-Invasive Techniques**: Non-invasive techniques in genetic counseling refer to medical procedures that do not require surgical instruments or invasive methods. They are designed to gather information without physically entering the body.

2. **Evaluating the Options**:
- **Amniocentesis**: This procedure involves using a needle to extract amniotic fluid from the uterus. It is invasive because it requires puncturing the amniotic sac.
- **Chorionic Biopsy**: This procedure involves removing chorionic villi from the placenta. It is also invasive as it requires surgical intervention.
- **Fetal Blood Sampling**: This method involves taking blood from the fetus, which again requires invasive techniques.
- **Ultrasonography**: This is an imaging technique that uses sound waves to create images of the inside of the body. It does not involve any surgical instruments or procedures that penetrate the body.

3. **Identifying the Non-Invasive Technique**: Among the options provided, ultrasonography is the only technique that is non-invasive. It allows for the visualization of the fetus and surrounding structures without any surgical intervention.

4. **Conclusion**: Therefore, the correct answer to the question "Which is a non-invasive technique of genetic counseling?" is **ultrasonography**.

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