This can also be called small-for gestational age (SGA) or fetal growth restriction. There are basically two different types of IUGR: Symmetric or primary IUGR is characterized by all internal organs being reduced in size. Symmetric IUGR accounts for 20% to 25% of all cases of IUGR.
Fragile X syndrome (FXS), also known as MartinâBell syndrome, or Escalante's syndrome (more commonly used in South American countries), is a genetic syndrome.
Fragile-X Syndrome is listed as a rare disease by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Fragile-X Syndrome, or a subtype of Fragile-X Syndrome, affects less than 200,000 people in the US population. Source - National Institutes of Health (NIH) Ophanet, a consortium of European partners, currently defines a condition rare when it affects 1 person per 2,000.