I have just been diagnosed with polyhydramnios at 26 weeks. I have been booked in for a GTT tomorrow to see if that is the cause. Baby measuring big and have another scan next week. Consultant had to dash off and deal with someone else so I didn't get much of an explanation. Does anyone have any experience of this and what it might mean for me and/or baby? On my notes it says AFI 28.6. Any ideas? Google is a bit scary on this topic so I'm resisting the urge. 20 week scan was normal.