I had a c-section 6 years ago due to a breech baby. Now I am 35 weeks pregnant and am under the care of a midwife with hopes of a VBAC. The wrench thrown in is that at 28 weeks I was diagnosed with gestational diabetes. However I have excellent (and I mean excellent) control of my blood glucose levels with diet and exercise alone. A couple days ago I had an ultrasound to check placement of the baby and was told the baby was already measuring 7 lbs 1oz and in the 93rd percentile. I was shocked as my last baby was born at almost 38 weeks and was only 6lbs 6oz so with the gestational diabetes being so well controlled assumed this baby would be similar. How freaked out should I be? Am I growing a giant baby that is going to lead to complications with my VBAC and what have I done wrong??? I thought I was doing so well. I spoke with my midwife by phone and she is waiting for the report but isn't super excited at this point.
VBAC with large baby???
Totally agree with pp; the ultrasound at this point isn't accurate enough to risk you out of vbac. I vbac'ed a 9.1 pound baby with no issues and only the tiniest of tears. Oh, and you have not done anything wrong! All babies are different. If you have kept your sugar under control then that's the only thing you really CAN control.
Try not to let them make you sweat.
Ultrasound estimates of fetal weight are notoriously inaccurate, especially at the extremes. Things like the baby's position and length can throw it off. My son was estimated the day before his birth to be 7lb 11oz; he was born at 9lb 4oz. (A VBA2C, by the way.) Now, they were off by a pretty huge amount, but here's the thing--it was well within the 20% margin of error they claim. One reason the tech was so wrong is that he has short little legs (he was actually my second shortest baby at 19", only 1 inch longer than my preemie). It's entirely possible to err in the other direction with a long baby.
Even if it's right on, or even if they're actually lowballing it, there's no reason to worry. My vaginally-birthed babies have all been at least two pounds heavier than my c-section babies. (My first two were breech, and though I have no way to prove it, I firmly believe that whatever led them to stay that way contributed to them not growing very large.)