The GD may not have been picked up. I have a freind who had her GD test at 26 weeks and passed. Bub was born at 36 weeks, was a big, swollen baby and had low blood sugar. He looked like a typical GD baby. They worked out she must have developed it after she did the test. It's one reason for doing regular finger***** tests, rather than a one off thing like the GCT or GTT.

My Mum had 4 big babies, all perfectly healthy. We're just tall.