Cell proliferation refers to the process by which cells divide and reproduce, resulting in an increase in the number of cells. This is a fundamental process for growth, tissue repair, and regeneration in multicellular organisms. Proliferation involves a series of tightly regulated steps in the cell cycle, where cells go through different phases: G1 (cell growth), S (DNA synthesis), G2 (preparation for division), and M (mitosis, where the cell actually divides). https://www.creative-biolabs.com/drug-discovery/therapeutics/cell-proliferation-assessment.htm