After I had my DS and lost the first it of weight Ifound my tum looked like a doughnut, cause it sunk in the middle round my belly button, so for the first half of this PG it always diped in a bit, now Im futher along its filled out again, I think it was due to the stratching of my stomach muscles before, but also like helen said, Iget a lopsided bump too, as Idont have any fat on my tum its just bump so depending on bub position it can go all sorts of funny shapes, my SILfound it really funny the other week cause my bump was cone shaped, it actually went stright out to a point!