Mention two permanent methods of sterilisation.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Sterilization:**
Sterilization is a surgical procedure aimed at making an individual incapable of reproduction. It is a permanent method of birth control that prevents pregnancy.

2. **Identifying Permanent Methods of Sterilization:**
There are two primary permanent methods of sterilization:
- **Vasectomy:** This is a surgical procedure performed on males. In this process, the vas deferens (the tube that carries sperm from the testicles) is cut, tied, or sealed to prevent sperm from mixing with semen during ejaculation. As a result, sperm cannot enter the female reproductive system, thus preventing fertilization and pregnancy.
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