I would think that's the Wichita
Only one I know of (there's a Wichita Falls in Texas, though)...
Fear of birth is something that's taken a long time...didn't happen overnight. At the turn of the century, doctors began realizing that there were a lot of women giving birth, and that midwives were in charge of what could possibly be a cash cow for them. So, campaigns began to make the midwives look dangerous and dirty. And hospital births became the vogue. Well, doctors hadn't learned very much about normal labor and delivery and thought a woman should stay flat on her back to make things easier for drs. As we know, this is much more painful.
So, I believe it was in the 20's that feminists started demanding availability of twilight sleep drugs to deal with the pain and indignity of birth. This made women absolutely loopy and I've heard some old nurses say it's like seeing a possessed person! They'd strap the moms down and knock em out, and drag out the baby. With so many women going through this, women lost faith in their bodies. We were conditioned to run to the hospital at the first sign of pain so the staff could "fix it" for us. My own mother told me that her one natural (meaning no drugs, she was still forced to stay in bed) birth was so excruciating, she thought she was going to die. This when I was pg with my first, nice, huh?
We're just raised in that society. The ones who spread that, I think, are probably the ones that never prepared and didn't listen to their bodies. Yes, it's awful if you fight it. Working with it, though, it's not something that is horrible. And, plus, everyone makes more money when there is fear involved.