I had the test with my first two babies, then moved to Scotland for my 3rd where the midwives were appalled I was given such a horrible test with no risk factors. If you are comfortable saying no, then that is what you should do. Remember, all tests are optional.

Bont.nt - please remember scans at your gestation are notoriously inaccurate for determining estimated weight. Palpations are much more accurate at your stage.