Most people I know that are of an age to be doing this sort of thing do engagement, wedding, maternity, and first photo. Gender reveal is often done by the person throwing you the gender reveal party, or some other family member who owns an SLR. The hardcore types do the actual birth ones, and those are always pro photogs.
A couple of years ago, I was browsing Pinterest, and for some unfathomable reason it kept suggesting maternity pins to me. One of them was a pattern to sew your own hospital gown. No kidding, it produced a shapeless, backless gown that tied back there and exposed your bum and everything. I mean, seriously, why would I invest time in sewing a garment that the hospital buys by the truckload and that makes me look fat and feel ill? Either let me wear my own PJs, or hand me one of the standard issue ones off the stack.