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Signs of a Mentally Challenged Baby

by
author image Sharon Perkins
A registered nurse with more than 25 years of experience in oncology, labor/delivery, neonatal intensive care, infertility and ophthalmology, Sharon Perkins has also coauthored and edited numerous health books for the Wiley "Dummies" series. Perkins also has extensive experience working in home health with medically fragile pediatric patients.
Signs of a Mentally Challenged Baby
Signs of a Mentally Challenged Baby Photo Credit Jupiterimages/BananaStock/Getty Images

According to the American Academy of Pediatricians (AAFP), two to three percent of infants are mentally challenged. Chromosomal abnormities, genetic syndromes, birth injuries and environmental factors can cause mental retardation. In 30 to 50 percent of cases, no definite cause is found, according to the AAFP. Mental retardation is classified as mild, moderate, severe and profound, with the most pronounced signs in children with profound retardation. A history given by the parents and observation of physical characteristics and developmental milestones may aid in diagnosis.

Signs Related to Genetic Disorders

Certain genetic disorders are associated with some degree of mental disability, such as Down Syndrome. Infants with genetic disorders often have certain facial or physical characteristics that alert the clinician or the parents to a potential problem. Dysmorphic or unusual features such as heavy eyebrows, low-set ears or widely spaced eyes may be a sign of a syndrome or genetic disorder that causes intellectual delays, according to the AAFP. Hand and feet anomalies, small size and small head circumference may also be signs of disorders that impact mental abilities.

Physical Delays

Infants with profound retardation may have poor muscle tone, poor suck, or an inability to coordinate suck and swallow, according to the AAFP. Children who are affected to a lesser degree may be slow to sit, stand and slow with other physical milestones, according to Keep Kids Healthy. They may not roll over by six months or crawl by 12 months. However, less than one percent of children who are behind the "chart" are just slow starters and catch up eventually, according to Keep Kids Healthy.

Speech Delays

While it's difficult to assess speech in babies, an inability to repeat sounds by three to six months, or a lack of babbling by five to nine months are signs of delayed speech and can indicate a possible disability. Babies normally say their first word by 14 months and use two-word combinations before age two, according to Keep Kids Healthy.

Environmental Response

Babies normally turn toward a voice as newborns, and smile either spontaneously or at a face by one to two months. Not meeting these milestone may indicate intellectual impairment. Other signs of developmental lags may include a disinterest in other people, lack of recognition of parents by three months and lethargy, according to Keep Kids Healthy.

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