Yep. There is more than one. There are actually 3 different types of Down syndrome. Something I didn’t even know until I was pregnant with Hudson. Hudson has the most common type- called Trisomy 21. This means that every cell in his body has 3 copies of the 21st chromosome instead of two. Most people have 46 chromosomes (23 pairs) but with Trisomy 21, every cell has 47 chromosomes. This type accounts for 95% of the cases of Down syndrome. Mosaic Down syndrome is another type of Down syndrome but