Etheredge was hospitalised on Saturday (September 1), hours before Brown was to perform with New Edition in Orlando, Florida.
It was later reported that Etheredge's seizure could have been triggered by diabetes, which she apparently developed while pregnant in 2009.
Brown - who married Etheredge in June in Hawaii - has now taken to Twitter to assure fans that his wife is resting peacefully as her recovery begins.
He wrote: "Once again... Thank u, Thank U, THANK U.. My family is doing great!!! B. Brown out!!!"
Brown emerged from a stint in rehab last week, having apparently "graduated" from the treatment centre.
Watch Bobby Brown's 'My Prerogative' music video below: