How often do babies die after amnio?

<1:200-1:1000. Amniocentesis complcations occur infrequently nowadays, with most recent studies quoting an overall complication rate of 1:200 - 1:1, 000. Fetal loss is a component of these complications and should occur even more rarely than those numbers above.
Amnio Risk. Some complications of amniocentesis include preterm labor and delivery, respiratory distress, postural deformities, fetal trauma and alloimmunisation of the mother. Amniocentesis related fetal demise is very low, but i would have you speak to your OB about all risks associated with any procedure during pregnancy.