I'm 9 weeks pregnant and measuring more like 14,I've not had a scan yet but hopefully will soon. My dates are right so its not that but it is my 4th baby so could it perhaps be related? Had very little ms but been fairly knackered. Only have one set of twins on mothers side (her aunts) so not a lot in family. Basically I'm asking how likely it is that the size is due to a twin pregnancy? Any ideas what else it could be as I'm now dying to know!