BekZ, I think you are not giving this OB enough credit. 3.8kg is a huuuuge baby that is quite obviously way too big to deliver naturally at full term (or whenever things happen without intervention)!!!
Sorry, I hope everyone realises that that comment was tongue in cheek.
A friend of mine had a baby girl at almost 3.9kg. Which if you ask me is a nice size (she and her husband are tall people). She had her naturally at the BC. When she went back to her original OB (she had seen him before being accepted into the BC), and he heard that her bubba was this big, he said: Oh, are you sure you didn't have Gestational Diabetes? Because a baby this large is not normal. What the???

Sasa