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.
XXX Syndrome (Trisomy X) What is XXX or Triple X syndrome? XXX syndrome (also called Trisomy X or Triple X) is caused by the presence of an extra âXâ chromosome in every cell. Typically, a female has two X chromosomes in every cell of their body, so the extra âXâ is unusual.