Children who have immunodeficiency syndromes may be subject to infection, diseases, disorders, or allergic reactions to a greater extent than individuals with fully functioning immune systems.
A family of genetic syndromes that are caused by changes in the same gene, Fragile X can result in impairments in a spectrum that ranges from mild learning problems with a normal range IQ to severe developmental disabilities.
Polydactyly and syndactyly are usually isolated conditions, meaning the child will have no other birth defects; however, both are also found in many complex and sometimes lethal groups of anomalies or syndromes.
Possible causes that center on the fetus rather than the mother include chromosomal abnormalities, genetic and other syndromes that impair skeletal growth, and defects of the placenta or umbilical cord.
Sleep disorders are a group of syndromes characterized by disturbance in the individual's amount of sleep, quality or timing of sleep, or in behaviors or physiological conditions associated with sleep.