Agenesis of the corpus callosum

we were informed today that our fetus has an agenesis of the corpus callosum we would like to have any info you can give us regarding this defect including the latest statistics regarding the probability of our baby being affected from what we understand the percentage is very high 1 in every 6 babies will be affected do you confirm this information which tests do you suggest we do if any at this point we are 21 weeks into the pregnancy

יש להתייעץ עם גנטיקאי