I'm 35wks pg, and the baby gets hiccups ALOT......at least 3 times a day.
Made the mistake of googling it, and there seems to be some belief out there that this can be due to the babys cord being wrapped around it's neck. I get the impression that this is only a concern, if the pattern of hiccups radically changes towards the end of pg - not if it's been a regular occurance. BUT, I will stress that this may be one of those bits of research that are questionable...
I'm trying not to worry about this too much - but was wondering whether anyone else has a serious hiccuper in their tummy?! DD was nothing like this one!