Which of the following is a technique of direct introduction of gametes into the oviduct ?

Options

A. MTS
B. ET
C. IVF
D. POST

Answer

To answer the question "Which of the following is a technique of direct introduction of gametes into the oviduct?" we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding the Options**: The options provided are MTS, ET, IVF, and POST. We need to identify which of these involves the direct introduction of gametes into the oviduct (fallopian tube).

2. **Analyzing MTS**: MTS stands for Mathurnal Syndrome. This is not a reproductive technique but rather a medical condition. Therefore, MTS is not the correct answer.

3. **Analyzing ET**: ET stands for Embryo Transfer. In this procedure, a fully developed embryo is transferred into the uterus, not directly into the oviduct. Thus, ET is also not the correct answer.

4. **Analyzing IVF**: IVF stands for In Vitro Fertilization. This technique involves fertilizing the egg with sperm outside the body in a laboratory setting. After fertilization, the resulting embryo can be transferred into the uterus or, in some cases, directly into the oviduct. This makes IVF a potential candidate for the correct answer.

5. **Analyzing POST**: POST stands for Physician's Order for Scope of Treatment. This is a medical directive and not related to reproductive techniques. Hence, POST is not the correct answer.

6. **Conclusion**: Among the options provided, IVF is the technique that can involve the direct introduction of gametes into the oviduct, especially when considering the transfer of gametes before fertilization.

### Final Answer:
The technique of direct introduction of gametes into the oviduct is **IVF (In Vitro Fertilization)**.