All of our children were breech.  There are no side effects; it just means the baby has not turned upside down, and it's quite common.  There are a huge range of reasons for a baby being breech, but they are RARELY anything serious.  Years ago, doctors would "simply" turn the baby--potentially dangerous and painful--and women today who choose to still have a natural birth sometimes still try this with success.  The most common solution is a c-section, which has its own potential complications.  Fortunately, c-sections are extremely common in Qatar, which has one of the highest rates of c-sections in the world. 

One thing you might notice is that your baby will have a particularly round head when first born, because it will not have been pressed during the natural birthing process!

Good luck and congratulations!