Hi Snaf.
I had it in my second labour, which was a VBAC.
I had been labouring at home, contractions from 07.30 , i went to the hospital about 10 hours later, when they were 4 - 5 minutes apart. Was given G&A, then checked, and told i was 2 cm , and not in labour.. G&A taken away and given paracetomal and told would have to go to AN ward. baby's heart rate going through the roof at this point, no doubt due to my distress. so stayed on labour ward
mw said baby posterior so needed to move with the ctx and not use gas and air, and she would see how i was getting on in an hour.
an hour later i was 3 cm, that hour was the worst of my whole labour, i was convinced dd was going to rip through my abdomen, the movements she was making were horrific. i was screaming so loud for the gas and air back the MW came running in !
once i knew i was 3 cm, i begged for more pain relief, as i thought i would not get through another 18 hours without anything stronger than g&a.
she gave me a small dose, and it relaxed me and between ctx i felt really rested, they were 2 mins apart lasting over a minute , so it gave me the illusion of rest
what confused me was that i was still in pain!! but coping better as did not have that terrifying, oh god heres another one tension going on
i dilated from 3 to fully in 2hours 45 and pushed baby out in 30 minutes. no intervention or further pain relief
baby was alert with good apgars and fed soonish after birth ( bottle , the breastfeeding is a whole other story )
i was not told anything about the timing of it, but was given a small dose, based on how slow my labour had been, i suppose they thought it would not be too close to delivery.
i would not have it again, purely for the fact i know i could cope much better, as my second labour wsa like a first for me, as i had induced labour first time with epidural and diamorphine, so felt nothing. ended up with c.s
i felt for me, it was appropriately given and had no ill effects on me or the baby, and had worn off sufficiently that i was able to push in a controlled way and was aware and alert, baby was alert at birth
HTH