A lemon to an apple is quite the jump in size. I'm assuming it is a medium sized apple, as opposed to one of those crazy big apples. So perhaps if we were looking at non-food options for our weekly comparisons we might say a baseball. Maybe?
Finally I think I am legitimately starting to round. I'll work on getting a belly picture before my DC trip next week. Because what fun is a pregnant lady without a round belly to show for it?