The other night I was watching an old episode of call the midwife with my mum and dad. Both of the women giving birth were screaming the place down and it got us chatting.........my brother was born at home and my dad said he never heard a sound from my mum even though he was in the next room (1971 dads were not welcome in the delivery room).
My mum said that she couldn't identify with the screaming woman as she went quiet when she was in labour, I was the same, I went quiet and didn't say a word during both my deliveries.
Judging by TV and movie representations of women giving birth everyone screams! I think just as many women stay quiet as scream, it's whatever works for you ..........
YANBU I didn't scream
YABU I screamed the place down