I’ve just lost a 20 weeks pregnancy due to the diagnosis of Arnold Chiari malformation and spina bifida lombara. I’ve tried to find out more details about Arnold Chiari syndrome on the net but I did not found too many. I’m interested if anyone knows if this can be tested earlier during the pregnancy and what causes this syndrome, how can I found out, now that I lost the pregnancy what was the cause and what medical checks should I do for a future pregnancy.