endocrine disorders, HIV or chronic malabsorption, chromosomal abnormalities, such as Turner's Syndrome.
Also, asthma, cystic fibrosis, malabsorption syndromes, cardiac anomolies, and chronic renal conditions.
Skeletal disorders from birth such as, achondroplasia, Hurler syndrome, Hunter Syndrome
the most common of all sex chromosome disorder, caused by the presence of one or more additional X chromosomes and only one Y chromosome.
Many males aren't diagnosed until they appear for an evaluation for infertility.
All have absence of sperm in the semen, small testes, and defective development of secondary sex characteristics (gynecomastia, hypogonadism)
Many will have cognitive impairment, gross motor skill difficulties, developmental language delay, poor verbal skills, reduced auditory memory, shyness, passivity, behavior problems, and school difficulties