Do we have more than one dream a night?
One has roughly four rapid eye movement, perhaps five rapid eye movement bouts during the night, so that number of potential dreams during the night and some people would say they're aware of the dreams running right through the night. So they could actually go through one REM episode into the next. For that reason there's no reason why one shouldn't have more than one dream. In fact, where subjects have been awoken during rapid eye movement sleep the first REM episode is quite short and very often people say they weren't dreaming, that mentation is really quite dull and not that interesting. In the second REM episode it does get a little bit more vivid, thus more likely to get a real dream report and it is not until the third fourth episode that's really getting lots of dreaming going on.