We have analysed the CAG repeat length in exon 1 of the androgen receptor g
ene in 48 Japanese males with cryptorchidism and 100 fertile Japanese males
. The CAG repeat length was 23.4 +/- 0.48 (mean +/- SE) (range 16-32, media
n 23) in cryptorchid patients and 23.5 +/- 0.29 (range 15-32, median 23) in
normal males. There was no significant difference between the two groups.
The expansion of the CAG repeats in axon 1 of the androgen receptor gene is
unlikely to constitute a major cause of cryptorchidism.