Further along!?!?

[Trillian]

Your baby isn't measuring that big, your uterus is, which wouldn't be uncommon if you have a lot of fluid in there. It is entirely possible that your dates could be out, but they would be out by a lot, and it would have had you conceive in your previous cycle. To say baby would to too big for your to birth naturally is a load of bull**** (sorry to sound crass but statements like this from Obs really bug the heck out of me). I assume this is your first baby? If it is, you don't know the full potential of your pelvis until you give birth and for him to say otherwise before hand is ludicrous. If you want to avoid a c/s, you have to get through to your Ob that you don't want one and would like to have a vaginal and or natural birth.

Here are some articles you might find interesting;
https://www.bellybelly.com.au/birth/...nown-and-loved
https://www.bellybelly.com.au/birth/...rint-for-labor
https://www.bellybelly.com.au/birth/...s-big-baby-cpd
You should also grab yourself a copy of the pink kit - click the on the vagina in my signature.

ETA - I just read up on the polyhydramios and there is a chance that you may have to give birth earlier anyway if it turns out that baby is better out than in, regardless of the baby's size.