Informing AVO is irrelevant. The guy has his MR already, there is no way the doctors will not know that the wife is preggy when they do thier tests. The results will be included in his e emedical report with her EDD. The tiny issue I foresee is during his PPR, they may, may ooooo, ehn hold onto dia passports untill the lady delivers as was done for some ladies whose EDD were near at the point of passport request. That for me is a non issue, what matters is dt the entire family gets thier visa finally.