When people ask how many siblings I have, I usually say three - a sister and two brothers. But it isn't true. I actually have three more. Two were miscarriages and one was a sister, Erin Patricia, who died when she was two weeks old. She would be 28 now.
When people ask how many children we have, we usually say "six" because explaining two miscarriages isn't comfortable.
This post reminded me of these things and I think everyone should go read it.