All of the following may occur in Noonan\'s syndrome except –
Hypertrophic cardiomyopathy
Cryptoorchidism
Infertility in females
Autosomal dominant transmission
Term 'Noonan Syndrome' has been applied to males and females who have some phenotypic features that resemble females with turner's syndrome (45 X O), but themselves have apparently normal sex chromosomes (46 XX or 45 XY).

Females usually show normal sexual maturation but it is delayed 2 years on an average.