I would feel desperately sorry for what the women had been though, but I don't think moonstorm is being unreasonable in not wanting to hear the stories while she is feeling vulnerable herself. If she had asked for them, that's one thing, but she clearly hasn't and being told them is only going to scare some people. Pregnancy can be a hugely worrying and anxious time for some people as it is.
I mean, wollyjo, you say yourself, that you don't share your story (and I'm so sorry that you have one) unless specifically asked.
I guess this sort of reminds me of when some people who struggle to conceive feel as if pregnant women don't have a right to complain about the trials and tribulations of pregnancy; instead they should just be thankful. Yes, they should, but they are also entitled to struggle with their pregnancy and vent about it if they need to.
It is awful that other people have had terrible experiences and losses during pregnancy, but it can also be really alarming to be told, unsolicited, about such stories when you're worried enough as it is. I mean, we don't always know the pregnant woman's own situation. Perhaps she's already had several losses, or taken a long time to conceive, or had repeated bleeding - all things which would have you unable to relax and enjoy the pregnancy anyway.
I have to say, I haven't experienced this myself in either pregnancy, but I would find it more annoying from people telling stories about friends of friends, or about something they'd once heard, than to be told it by someone who'd actually been through it. Although I'd still wonder if sharing such a sad, personal thing with a pregnant woman was really appropriate.