Last updated on December 31, 2025
Question:
Morning sir,
I’ve got a couple of questions for you: In Tanner Stage Three, when a boy starts growing fast, when does the growth spurt happen, and does it speed up toward the end of the stage?
Answer:
It can happen at any time during that stage, though most often in the middle. Many boys experience a dramatic short burst of growth, but some experience a slight increase in their growth rate over a more extended period. Stage 3 ends when the growth rate slows to childhood levels.