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 (FXS) is an inherited genetic disease passed down from parents to children that causes intellectual and developmental disabilities. Itâs also known as Martin-Bell syndrome. FXS is the most common hereditary cause of mental disability in boys. It affects 1 in 4,000 boys.