mine were born at 27 weeks, we only had one survivor and he was about 2 months in the hospital then home a week then back inthe hospital for 2 weeks then home. We have had a few more hospital stays but they were usually 2 - 4 days and in our local hospital. His other stays were at med centers that we had to travel to.
I had went in labor at 29 weeks but was able to stop labor (I was in the hospital for 5 days) and stay pregnant longer. My twins were born at 34 weeks. I'd already had a steroid shot so their lungs did well. They spent 10 days in. They were in the 4 lb range. I honestly think they could have been in longer if I had not set my mind to getting them feeding on their own sooner.