Cheers for that! I'm actually not sure why, if it has to do with the new save or just luck, but this time around my sim got to deliver a baby on her very first active day at level 8! I was VERY surprised as when she got to promotion I was thinking "alright, now let's wait for ever...." !!
So, my problem now is that I don't know if there was an issue with my old save (quite old, many generations) or if I was just being impatient. I had a number of issues with it so maybe the save was corrupted or something. Or maybe it's just luck this time! I struggled with the diagnosis at the beginning, way more than the first time around, but now that she's at a higher level it's actually very easy. Often she gets one final choice at the end of the tests so she can't really get the wrong diagnosis, and if not, the symptoms are incredibly obvious compared to the beginning of the career!
So anyways, I'm good now! I did have a question though, how does it work when they spawn the pregnant sim to deliver? Do they "create" a random pregnancy or do they use a sim already pregnant? Because the one my sim delivered is married to a woman so I thought it was odd that it was her...