we didn't have any tests done, because we knew we wouldn't act on them (wouldn't have a termination). And I wasn't prepared to take the risk of an amnio. Dh felt same way, we would deal with what ever there was.
In retrospect, if anything had been wrong, it would probably have been good to have some preparation.
But with dd2 our 20 week scan picked up a heart problem. I ended up flying back to uk, family spent 4 months split over 2 continents. I had scans every week and was all on red alert etc. By the time she was born, they had decided there was nothing wrong, and we had a normal birth etc. It was an awful time, expecting baby to die inutero at any point, and then it was all a false alarm.
Also now, I have a niece with massive heart problems undetected before birth, a niece with a huge facial birthmark, and my goddaughter's sister was born with lifelong medical problems. All are gorgeous fabulous people. I struggle with the idea that if those tests are fine, then we think eveyrthing is fine.
It is such a personal decision though