Insurance for visit visa

I want to know that for the extension of visit visa ,is the requirement of insurance policy.
My family in saudi Arabia i have a baby ,i want to extend the visa , so is it compulsory to renew or take new insurance visitor policy.
Because first time it is compulsory to take insurance policy for visit visa other wise visit visa will not issue.
Please guide me as soon as possible.
Thanking you

I think it is not required