My brother in laws wife is supposedley 36wks preg.?

She was having contractions pretty regularly, but it was always false labor. The docs did give her a shot of steroids and meds to stop her contractions. Now they say that they are going to induce labor at 38wks. She already measures to be 37wks preg. not 36. And they say that the baby weighs 7lbs. and it's probably because of the steroid shot. Is it me, or is this a crock. I thought the steroid shot wouldn't affect the baby's weight or anything of that nature.