Turner syndrome can be diagnosed at various stages of life, including before birth, during infancy, in early childhood, and even during the teen or young adult years.
According to the reference material:
- Turner syndrome may be diagnosed before birth (prenatally), during infancy or in early childhood.
- Occasionally, in females with mild signs and symptoms of Turner syndrome, the diagnosis is delayed until the teen or young adult years.
Therefore, there isn't a single "age" for diagnosis; it depends on the severity of symptoms and when medical professionals identify them.