How did u mothers push a big baby?

Iv

My scan today says 9.2 pounds( 4.211kg) . My twin girls weighed 5.9lbs (2.7kg )and 6.1lbs (2.8kg)so I was hoping this baby would be smaller than 9.2lbs . I’m so scared right now , I don’t know how I’ll be able to push a baby this big