Hi OP,
May I ask what you hope to gain by asking people about which bit hurt most? Will it offer peace of mind?
I ask because there might just be another way of looking into this matter. Maybe exploring the way the female body is designed and usuallY works, exploring the mechanics of birthing a child, and the mechanics of fear and the way fear works inside the body would help?
I strongly recommend that you read some books on the mechanism of birth by people like Sheila Kitzinger, or Ina May Gaskin. It may offer you an insight into the body that a knowledge gathered from media images of women giving birth or even birth stories may not provide.
There are many ways of approaching birth. Of course one needs to recognise all possibilities. But generally, awareness of the mechanics, and having some strategies to deal with anxiety helps situations, whatever turn your birthing takes.
So instead of approaching it with fear, and trepidation, maybe the second trimester can be spent reading these accounts I suggested above and from there maybe looking into methods to remove anxiety and fear from the process?
I was always tokophobic and had a huge fear of birthing. I am due to give birth to my first child in a few weeks. Of course my birtng could end up with all sorts of interventions, and Trauma, and trust me, have I researched these inside out!
But at the moment, I am feeling far better prepared to walk into birthing day without fear - than with it. Irrespective of what that day holds for me.