During a contraction babies don't receive adequate oxygen from the placenta. Which is why we worry when contraction are too close/often or lasting too long. A baby cannot survive 51 minutes without adequate oxygenation. Did you feel your uterus and it was tight for 51 minutes? Or did you have back pain/pressure for that long? I would guess that babies position made it feel like a constant contraction, but in reality it wasn't. Not only that but if your uterus was truly contracted for that long, you would have had a horrible postpartum hemhorage.
Melissa, L&D nurse and wife to my soulmate Shawn.
Mama to 3! Brooke (4), Katie (3) and our newest addition, Ryan born 3/5/2011!