WHen my wife was going through GD we had to go in for stress tests twice a week. All they do is hook her up to some probes on the belly to hear the baby's heartbeat. She would go through a ton of cold water to get our son to keep moving for these tests.
God, that was such a stressful month. Here we were, so close to having him, and now we were going into the doctor's all the time to make sure that he was not too stressed in there.
A lot of stess after they are born too, but it is totally different.