List three techniques that have been developed to prevent pregnancy. Which one of these techniques is not meant for males? How does the use of these techniques have a direct impact on the health and prosperity of a family?

Explanation

### Step-by-Step Solution:

**Step 1: Identify three techniques to prevent pregnancy.**
- The three techniques developed to prevent pregnancy are:
1. **Barrier Method**: This includes the use of condoms, which can be used by both males and females.
2. **Copper T Method**: This involves the insertion of a Copper T device into the uterus of females.
3. **Surgical Method**: This includes procedures such as vasectomy for males and tubal ligation for females, which involve surgical intervention to prevent pregnancy.

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