Well currently i'm 31 weeks preg...second pregnancy.

Just wondering at a check up at 21week my measurements were 24 weeks but within the next check up at 26 weeks my measurements were 26. i then started fortnightly visits and my appointment at 28 weeks i measured 29. Next visit 31 weeks i measured 33....

Does this mean that i'm having a big baby or that my dates could be wrong????

As i dont get a monthly we werent sure of my EDD and went by 12 week US date. Are these accurate???

Any help would be great- thanks