Fig. 2. Distributions of CGG repeats in female and male participants.

Premutation-range CGG repeats are defined as 55 to 200 repeats, and normal range is considered to be 24 to 40 CGG repeats. In total, 98 premutation carriers were identified (72 females and 26 males), and we selected 1001 age-matched controls (494 male and 507 female controls). CGG repeats in female premutation carriers ranged between 55 and 125, and in male premutation carriers, the range was between 55 and 96 CGGs.