Yeah just take it as an estimate. Ive seen babies come 4 weeks early but be completely healthy and pretty big. If people are buying plane tickets to come for the labor some airlines do something like "stand by" tickets just incase.

Oh wow and that's 2 weeks difference @mrs.jones253

at the beganning of ur pregnancy they go by ur last period but later on they go on the mesurements of the baby so ur first due date can change as ur baby gets bigger

They may even change it later on when the baby gains weight. My daughter went from Aug. 24 to Aug. 12 just recently because of her weight