Hi and welcome to the Chiari forum.
The research is still being done on if this is genetic, but as Munchies mentioned we have seen many families with several members with the condition, sometimes it is the parent and a child and sometimes it is several children....
It is a wise decision to have all of ur children checked, and get the results from a true chiari specialist...expect u may have to travel to get to one, but it is well worth it.
Ask questions, educate urself the best u can so u will know when u have the right dr,
KNow u r not alone : )
Yea I've seen numerous people with family members with chiari. Doctors try and say not hereditary ... But it clearly is in some cases