How long does the proliferation phase of wound healing typically last?

How long does the proliferation phase of wound healing typically last?

• A. 1-2 days
• B. 3-20 days
• C. 21-28 days
• D. 2-3 months

Answer: (B)

The proliferative phase is when the wound bed fills with new tissue and the surface begins to cover the gap. Fibroblasts produce collagen and extracellular matrix, new blood vessels form to restore blood supply, and epithelial cells migrate from the edges to re-cover the wound. This phase typically starts about 3 days after injury and lasts roughly up to 20 days (often cited as 3–20 days). That window captures the period when granulation tissue, angiogenesis, and rapid tissue formation are underway before remodeling strengthens the tissue. Shorter timeframes (1–2 days) are still mainly inflammatory, while longer spans (21–28 days or longer) lean into the maturation phase where collagen is organized and tensile strength increases over weeks to months.

The proliferative phase is when the wound bed fills with new tissue and the surface begins to cover the gap. Fibroblasts produce collagen and extracellular matrix, new blood vessels form to restore blood supply, and epithelial cells migrate from the edges to re-cover the wound. This phase typically starts about 3 days after injury and lasts roughly up to 20 days (often cited as 3–20 days). That window captures the period when granulation tissue, angiogenesis, and rapid tissue formation are underway before remodeling strengthens the tissue. Shorter timeframes (1–2 days) are still mainly inflammatory, while longer spans (21–28 days or longer) lean into the maturation phase where collagen is organized and tensile strength increases over weeks to months.