What has your AFI been at 31 weeks? I’m high risk and having my first growth scan tomorrow to check…

What has your AFI been at 31 weeks? I’m high risk and having my first growth scan tomorrow to check fluid etc and I’m wondering what’s considered safe or average at this point. With my son I had complications, one of them was Oligohydramnios (very low fluid) which caused him to have IUGR (he quit growing)