A device is inserted in the uterus for contraceptive effect. Which of these effects won't be caused by it?

Options

A. Increasingly phagocytosis of sperms
B. Suppressing motility of sperms
C. Preventing implementation of the blastocyst
D. Preventing ovulation

Answer

To solve the question regarding the effects caused by a device inserted in the uterus for contraceptive purposes, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Device**: The device referred to in the question is an Intrauterine Device (IUD). IUDs are contraceptive devices that are inserted into the uterus to prevent pregnancy.

2. **Understand the Types of IUDs**: There are two main types of IUDs:
- **Copper-Releasing IUDs**: Such as Copper T or Copper 7, which release copper ions.
- **Hormone-Releasing IUDs**: Such as LNG-20, which release hormones.

3. **Determine the Effects of IUDs**:
- **Increase Phagocytosis**: IUDs can increase the activity of immune cells, leading to increased phagocytosis of sperm and potential embryos.
- **Suppress Mortality of Sperm**: Copper IUDs can suppress sperm motility, making it difficult for sperm to reach the egg.
- **Prevent Implantation of Blastocyst**: Hormone-releasing IUDs create an environment in the uterus that is not suitable for implantation.
- **Prevent Ovulation**: This effect is primarily associated with hormonal contraceptives like birth control pills, not IUDs.

4. **Identify the Effect that Won't be Caused by IUDs**: Among the effects listed, preventing ovulation is not an effect caused by IUDs. This is because IUDs primarily work by creating a hostile environment for sperm and preventing implantation, rather than directly inhibiting ovulation.

5. **Conclusion**: The correct answer to the question is that the effect that won't be caused by the IUD is "prevent ovulation."

### Final Answer:
The effect that won't be caused by the device (IUD) is **prevent ovulation**.

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