Developmental Delay | Definition and Patient Education
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What causes developmental delay? 16 possible conditions

Children reach developmental milestones at their own pace. Minor, temporary delays are usually no cause for alarm. An ongoing delay or multiple delays in reaching milestones is called developmental delay. Developmental milestones include language, thinking,... Read more

See a list of possible causes in order from the most common to the least.

1

Mental Retardation

Mental retardation or intellectual disability, (MR/ID), exists in children whose brains do not develop properly or function within the normal range. There are four levels of retardation: mild, moderate, severe, an...

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2

Cerebral Palsy

Cerebral palsy is a group of disorders that affect muscle movement and coordination. Learn about the causes, types, symptoms, and treatment of cerebral palsy.

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3

Down Syndrome

Down syndrome (sometimes spelled "Down's syndrome") is a genetic abnormality. It is the most common single cause of birth defects in the United States.

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4

Failure to Thrive

Your child may be diagnosed with failure to thrive if he or she falls below a healthy weight and shows signs of emotional underdevelopment. Typically, failure to thrive is discovered during a child's infant years. Idea...

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5

Muscular Dystrophies

Muscular dystrophies are a group of inherited diseases that damage and weaken your muscles over time. This damage and weakness is due to the lack of a protein.

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6

Hookworm Infections

Hookworms are parasites that affect the small intestine and lungs. The first sign of infection is usually a rash where the parasite entered the skin, followed by diarrhea.

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7

Hydrocephalus

Hydrocephalus is a condition that occurs when fluid builds up in the skull and causes the brain to swell. The name literally means "water on the brain."

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8

The Truth Behind Clumsy Child Syndrome: Developmental Coordination Disorder

Children normally develop the ability to sit up, stand, walk, and talk at predictable ages. When they are late in achieving these milestones, it may be due to a developmental problem. Developmental Coordination Disorde...

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9

Cystic Fibrosis

Cystic fibrosis causes severe damage to the respiratory and digestive systems. Learn about its symptoms, causes, diagnosis, and treatment.

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10

Fetal Alcohol Syndrome

Fetal alcohol syndrome (FAS) occurs when a baby is born with varied mental and physical defects due to the mother consuming alcohol during pregnancy.

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11

Homocystinuria

Homocystinuria is an inherited disorder that keeps the body from processing the essential amino acid methionine. Amino acids are the building blocks of protein.

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12

Tuberous Sclerosis

Tuberous sclerosis (TS) is a rare genetic condition. Sometimes called tuberous sclerosis complex (TSC), the disorder causes noncancerous (benign) tumors to grow in the brain and other vital organs, and on the skin...

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13

All About Abetalipoproteinemia

Abetalipoproteinemia (ABL) is an inherited condition that prevents the body from completely absorbing certain dietary fats.

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14

Phenylketonuria

Find information on phenylketonuria causes, symptoms, diagnosis, and treatment.

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15

Aase Syndrome

Aase syndrome is a rare, potentially genetic condition characterized by several birth defects. These include a reduced number of red blood cells from birth and three bones in one or both thumbs, instead of two.

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16

Adrenoleukodystrophy

Adrenoleukodystrophy refers to several conditions that affect the nervous system and adrenal glands.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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