Hi and welcome to the Chiari forum.
With each pregnancy u run a risk of making ur symptoms worse....and it is highly suggested that u have a C-section to avoid the strain of natural childbirth.
I had one pregnancy and one natural childbirth b4 I knew I had chiari...I was in awful pain b4 and after and was in the hospital for 5 days due to a CSF leak.
There is a RN that wrote a book on Chiari and Pregnancy...her name is Diane M. Mueller Diane Mueller, ND, RN, C-FNP.
Dealing with chiari is difficult and then add children...I always wanted more, but wonder if I would have been able to handle it all.
Keep in mind the symptoms u already have...the more active u r, the more u can trigger ur symptoms...they also do cycle....and we can have periods where it is dormant and then times when we r in a flare.
Find a true chiari specialist to see how ur chiari is affecting ur overall health and how a pregnancy would affect it.
Here is a link to a list of the members Drs...the list is not meant as a referral...but a means to help u research drs......