How risky is an amniocentesis?

Has risks: All procedures have risks and benefits. Refer to provider for their risk ratio.

1%-1/1000 risk loss.: The risk of fetal loss ranges roughly between 1/100 and 1/1000 with lower risks reported more recently as machines and instruments have improved. The risk of fetal loss increases with maternal age, sonographic markers of anomalies, prior vaginal bleeding/short cervix, number of needle insertions and poor fetal growth. Some women go on to preterm birth or rupture of membranes weeks after.