Oh, I need to add, that my cousin was told that her little girl would have 95% chance of having missing limbs, defects, and down syndrome, and they should abort at 6mnth gestation. I just want you to know that her little girl is 11 now, and perfectly healthy. What will be, will be, and you just have to do your best to support and care. A child with a defect just needs a little more love, attention, and care. Best of luck to you and your children.
Amniocentesis should be done.
the baby may have a heart murmur not only downs babys get this but everybaby is at a risk, most murmurs heal on their within a year, try not to worry, if there is no down syndrome in family you should be fine