Passing wind during ghusal;wanting to have a baby

As-Salaams Mufti. I hope you are well. I would like to enquire, during making Ghusal, one passes wind, does the Ghusal need to started over or can complete the Ghusal as per normal.
My second question is, my wife and I have been married for a few years and are trying to have a baby (Insha Allah whom will be the flag bear of Islam), what is a the Dua to read so that Insha Allah, Allah in his Mercy grants us a baby?

Was-Salaam