Labor is generally faster without an epidural, but the difference is smaller than many people expect. High-quality meta-analyses show that epidural analgesia adds roughly 30 minutes to the first stage of labor (dilation) and about 15 minutes to the second stage (pushing) on average. Those averages, however, don’t tell the whole story. For some women, especially first-time mothers or those whose babies are in a less-than-ideal position, the slowdown can be significantly longer.
How Much Time an Epidural Adds on Average
Cochrane reviews, which pool data from multiple high-quality trials, consistently find that epidurals extend labor by a modest amount when you look at the median. The first stage, where your cervix opens from about 6 centimeters to full dilation, runs about 30 minutes longer with an epidural. The second stage, when you’re actively pushing, runs about 15 minutes longer. For a labor that might already last 10 to 14 hours, an extra 45 minutes total may feel negligible.
But averages can be misleading because they’re pulled toward the center by the majority of straightforward births. The picture changes when you look at the outer range of labor times, which is where things get more relevant if your labor happens to stall or slow down.
The Longer Labors Tell a Different Story
A large study published in Obstetrics & Gynecology looked at the upper boundary of normal labor length (the 95th percentile, meaning the longest 5% of labors) and found a much bigger gap between epidural and non-epidural births. For first-time mothers, the second stage lasted up to about 3 hours and 17 minutes without an epidural versus 5 hours and 36 minutes with one, a difference of more than two hours. For women who had given birth before, the gap was even more striking: about 1 hour and 21 minutes without an epidural compared to 4 hours and 15 minutes with one, a difference of nearly three hours.
This doesn’t mean every epidural adds hours to labor. It means that when labor does run long, an epidural is associated with a substantially longer tail end. If you’re someone whose labor was going to be quick and uncomplicated, the epidural may barely change the timeline. If complicating factors stack up, the slowdown can be considerable.
What Actually Slows Things Down
The mechanism isn’t as straightforward as “epidural weakens contractions.” Research measuring uterine activity before and after epidural placement has found no significant change in contraction frequency. Women averaged about 8 contractions per 30-minute window before the epidural and roughly 8.8 after, a difference that wasn’t statistically meaningful. Whether epidurals reduce the intensity or pressure of each contraction is harder to measure and still debated, but the contractions themselves keep coming at a similar pace.
The more likely explanation involves your pelvic floor muscles and your ability to push effectively. An epidural numbs the nerves that give you the involuntary urge to bear down. Without that reflex, pushing becomes a more conscious, coached effort, which tends to be less efficient. The pelvic floor muscles also relax under the epidural’s effect, which can reduce the natural forces that help rotate the baby’s head as it descends through the birth canal.
Baby’s Position Matters
One underappreciated factor is how the epidural can affect the baby’s positioning. Research from the European Journal of Obstetrics and Gynecology found that when an epidural is placed while the baby’s head is still high in the pelvis, the odds of the baby settling into a posterior or transverse position (sometimes called “sunny side up”) roughly double. Babies in these positions take longer to deliver and more often require assistance. The relaxation of pelvic floor muscles may reduce the mechanical forces that would otherwise nudge the baby into the optimal face-down position during descent. In the study, the station of the baby’s head at the time of epidural placement was the only factor significantly linked to this malposition, outweighing whether it was a first birth, whether labor was induced, or how dilated the cervix was.
Epidurals and Assisted Delivery Rates
A longer pushing stage isn’t just about time on the clock. It’s connected to a higher chance of needing forceps or vacuum assistance to deliver. A Cochrane meta-analysis of 21 studies involving more than 6,600 women found a higher rate of instrument-assisted vaginal delivery among women who had epidurals compared to those who did not. This makes sense given the reduced pushing reflex and the potential for the baby to stay in a trickier position longer.
Cesarean section rates, on the other hand, have not been clearly increased by epidurals in randomized trials. The link between epidurals and C-sections is one of the most persistent concerns among expectant parents, but the best available evidence doesn’t support it. The main trade-off is a longer pushing phase and a greater likelihood of needing help with delivery, not a higher chance of surgery.
How Medical Guidelines Account for the Difference
Doctors and midwives already build in extra time when you have an epidural. The American College of Obstetricians and Gynecologists defines a prolonged second stage as more than 3 hours of pushing for first-time mothers and more than 2 hours for women who’ve given birth before. These thresholds are set with the expectation that epidural users will push longer. If you approach those limits, your care team will assess your progress, the baby’s condition, and your preferences before deciding whether to intervene or continue waiting.
ACOG emphasizes an individualized approach rather than a hard cutoff. If the baby is tolerating labor well and you’re still making progress, extra time in the second stage isn’t automatically a problem. This flexibility matters because the research on upper-range labor times suggests that some women with epidurals simply need more time to push effectively, not that something has gone wrong.
What This Means for Your Decision
If speed is your primary concern, skipping the epidural does give you a statistical edge. But for the typical birth, that edge is measured in minutes, not hours. The more meaningful consideration is what happens at the extremes: if your labor is one that runs long, the epidural is likely to make it run longer still, and you’re more likely to need instrumental help delivering.
Low-dose epidural techniques, sometimes called “walking epidurals,” use much smaller amounts of numbing medication blended with pain-relieving additives. These are designed to preserve more muscle function and sensation than traditional epidurals. Studies comparing different low-dose formulations show average total labor times in the range of 5.7 to 7.1 hours, though direct head-to-head comparisons against no epidural at all are limited for these newer approaches.
The timing of placement also seems to matter. Getting an epidural while the baby’s head is still high in the pelvis is associated with more positioning problems. Waiting until the baby has descended further may reduce that risk, though this needs to be balanced against your pain level and how quickly labor is progressing. There’s no single right answer, but knowing that the timing can influence how smoothly the rest of labor goes gives you something concrete to discuss with your care team.