I told a pregnant woman her hair was going to fall out. 

I have no business dolling out advice at the best of times. But to a pregnant woman? I am not pregnant, nor have I been pregnant so what gives me the right? Sheer thoughtlessness and stupidity that's what. 

Anyway, I think I sufficiently terrified this poor girl. In my defence I'm an idiot - also, I assumed if I knew about the post birth hair loss thing ALL pregnant women did to. I was wrong. I think I saved the situation by yammering on about the dozens of women I know that recently had babies and the helpful fact that they aren't balding. Phew.