Well my mum was living apart from my dad (although I had another biological father) and in those days (1944) men were not allowed into the labour ward. Even the doctor wasn't there, as I was born in a thunderstorm at 5am (says it all really) being mum's 6th child I just sort of popped out without any warning and the nurse in charge was mortified.
When my daughter was born in 1986 here in private clinic in Ibiza, there was no way they would allow Mr N to be in the room, anway she only took 25mins start to finish, and (I still had my jumper on), Mr N was relieved as he didn't want to see any of it.