#1: PPROM at 29 weeks, 2.5 hour labor (after being hospitalized and on magnesium sulfate for 4 days), no pain meds but I was close to saying yes when the nurse asked during transition. My DH said no for me, and then they checked me and found baby was RIGHT there and ready to come out. I was still in the antepartum unit, so they raced me down the hall to the LDR, and as my bed was going through the antepartum room doorway, I started feeling the urge to push. That labor was fairly painful because I was laying in bed the whole time - not allowed to get up except to have a bowel movement (which thankfully I needed to do right around the time of transition). Baby was 3 lbs 13 oz, first degree tear due to purple pushing (he was out in 3 pushes), no pain meds though.
#2: Full term (barely) and out of hospital... 5 hour labor, most of it feeling like mild AF cramps. They got more intense later on, but didn't really HURT so much, as long as I stayed upright (which my body was screaming to do during labor #1). I labored on the toilet at home, and on the birth stool at the "birth house" (I cross state lines to birth with a midwife). I didn't even really notice transition until I looked back afterwards and realized there was a point where I was thinking "I hope this is over soon", but it wasn't a "I don't think I can do this anymore" like I had with my first birth, so that's why I kind of missed it.
My body started pushing, and my midwives reminded me to let my body do the work.
It was much more calm and much less painful all around. Baby was 7 lbs 4 oz, first degree tear along the old tear line (I did physically try to push baby out at the last minute, which I think contributed to that), no stitches of the tear so it healed really quick. I felt GREAT after that birth. My DH also noticed how much less painful it was for me.
I don't know how much of my labor differences were first vs. second baby or hospital vs. out-of-hospital birth. I tend to think it's probably a combo. And while the length did increase, that was not too surprising because of the circumstances of my first birth. My mom's labors were 5 hours, 2.5 hours, and 1.5 hours, respectively, and hers all got easier. My sister's was 5 hours, 3.5 hours, and again got easier. So in my family, that does seem to be a trend. I'm just hoping I won't get the 1.5 hour labor this time, as that's a bit too intense, plus I *really* want a waterbirth and last time we didn't make it time (but we also didn't go up to the birth house until a little over an hour before baby was out).