Quoting Caitlin :" I understand what you ladies are saying about not having being mean. But they obviously have some form ... [snip!] ... I knew nothing about pregnancy, but I started reading anything and everything as soon as we started TTC. Its not that hard."
Because they don't know that it's wrong. When a person has been told one thing their entire adolescent life and pregnancy the idea of questioning it doesn't really register. I thought women were only pregnant for nine months throughout my entire first pregnancy, I also thought that 37 wks was full term. Sue me, it's what I was told by people I trusted and my OB never made a distinction between term and full term.