I am from continent and My wife who is by birth American has applied I130 Form for her spouse on 24th march 2014 and she received I 797 Form on 1st September 2014 with “ approval notice, Section Husband or Wife of US citizen, 201(b)INA” . and the case is send to NVC. As my wife thought that after receiving approval notice of I 797 form than we do file i-129F, therefore, she did not submit I-129F form. Now we know that we can only file I 129F before the approval notice of I 797. Would you please guide me, whether we can file now after having received approved I797 Form or not. Further, what should we do now for further proceeding. I need you people guideline on this subject, please