Last updated on August 6, 2022
A question for you: How many years into puberty is the start of Tanner Stage 4?
The start of puberty is the start of Tanner Stage 2. Each stage is roughly two years long, so it will be four years to reach the start of Tanner Stage 4.
I should mention that I use a modified definition of the start of Stage 4. Dr. Tanner’s original definition made stage 3 last only a year at most and stage 4 last three years. The alternative definition evens up the length of each of the stages to about two years.