Hi everyone. I had my 20w morph scan yesterday (I'm 19w5d) and am measuring at 21w3d! My dates aren't out as it's an IVF pregnancy. Anyone know if this could be gestational diabetes (I'm actually on the tiny side not overweight), earlier EDD or just a huge Bub? Also my placenta is completely covering my cervix... Does anyone know if it moves that much before birth?