What is sigmoid curve? Mention their phases?

Explanation

Stages in Growth rate:
1. The total period from initial to the final stage of growth is called the grand period of growth.
2. The total growth is plotted against.
2. The total growth is plotted against time and .S. shaped sigmoid curve (Grand period curve) is obtained.
3. It consists of four phases. They are:
1. Lag phase
2. Log phase
3. Decoelerating phase
4. Maturation phase