Re: What comprises "unnecessary"
I think that tests that are unnecessary if you wouldn't end up doing anything differently, anyways. These things often include NT screens (would keep the baby regardless of DS or not), progesterone levels (many doctors let nature take its course except for recurrent miscarriages), and rhogam shots if DH is rh negative. Most doctors don't recommend anyone skipping things like the GD test because GD can strike anyone (even though it's less likely for people who eat well) and it's a BIG deal left untreated. The 20 week anatomy scan can make a big difference for early treatment, too.