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.
âFragile X syndromeâ is also known as Fragile X. It is the most common genetic form of mental retardation. It occurs due to changes in a gene which is passed on from one generation to the other. It can affect people belonging to all income levels and ethnic groups.