Giving birth is a process that unfolds in distinct stages, each with its own physical demands and timeline. For a first-time birth, labor typically lasts between 12 and 24 hours total, though it varies widely. Understanding what your body does at each stage, what choices you have, and what the experience actually feels like can help you prepare for one of the most physically intense events of your life.
The Four Stages of Labor
Labor divides into four stages: cervical dilation, pushing and delivery, delivery of the placenta, and the first hours of recovery.
The first stage is the longest. Your cervix needs to open from closed to 10 centimeters, and it does this in two phases. The early (latent) phase covers dilation from 0 to about 6 centimeters. This phase can last up to 16 hours regardless of whether it’s your first baby or not. Contractions during this time are typically irregular and manageable. Many people spend this phase at home, walking around, eating light meals, and timing contractions. The active phase picks up from 6 to 10 centimeters, and your cervix typically dilates 1 to 2 centimeters per hour. Contractions become longer, stronger, and closer together.
The second stage begins when you’re fully dilated and ends when your baby is born. For first-time mothers without an epidural, this stage averages about 36 minutes. With an epidural, it’s closer to an hour. If you’ve given birth before, pushing often takes as little as 6 to 12 minutes without an epidural. The upper limit of normal for first-time mothers is about 3 hours without an epidural and 3.5 hours with one.
The third stage is the delivery of the placenta, which usually happens within 5 to 30 minutes after the baby is born. You’ll feel mild contractions and may be asked to push gently one more time. The fourth stage covers the first 1 to 3 hours after delivery, when your care team monitors you for bleeding and your body begins its immediate recovery.
What Your Body Does During Labor
Two things happen to your cervix before and during labor: effacement and dilation. Effacement is the thinning and stretching of the cervix, while dilation is the widening of the cervical opening. Both need to happen before your baby can move through the birth canal. Your cervix goes from a firm, closed structure to paper-thin and 10 centimeters wide.
Your body orchestrates this with a cascade of hormones. Oxytocin drives uterine contractions and increases as labor progresses, with a surge during late labor that helps power pushing (called the Ferguson reflex). Your body also releases its own natural painkillers, beta-endorphins, which rise as contractions intensify. These endogenous opioids provide built-in pain relief and can create feelings of euphoria, particularly after birth.
Adrenaline plays a dual role. Early in labor, high stress or fear can slow or stall contractions by diverting blood away from the uterus. This is why feeling safe and calm matters during early labor. But in late labor, a natural adrenaline surge serves a critical purpose for the baby: it helps clear fluid from the lungs, preserves blood flow to the heart and brain, mobilizes energy stores, and promotes the alertness newborns need for their first breastfeeding.
How Pushing Works
There are two approaches to pushing: directed and spontaneous. Directed pushing is the classic coached method where you hold your breath, bear down hard, and push for a count of ten. Spontaneous pushing means following your body’s urges, breathing through contractions, and pushing when and how it feels right.
A meta-analysis of ten studies involving over 1,500 women found that spontaneous pushing reduced the rate of cesarean delivery by 58% and cut the rate of extended episiotomy (a surgical cut to widen the vaginal opening) by about half, compared to directed pushing. Importantly, there was no difference in how long the second stage lasted between the two approaches, and newborn outcomes were the same. For women without an epidural, following your body’s instincts appears to be the more protective choice.
Positions That Help
The position you give birth in makes a measurable difference. Lying flat on your back (the lithotomy position) is the most common hospital position, largely because it gives providers easy access. But research shows that nonsupine positions, including side-lying, hands-and-knees, squatting, kneeling, and sitting upright, are associated with significantly less perineal tearing, less blood loss, and a shorter pushing phase. Women who pushed in a non-back-lying position were 59% more likely to have an intact perineum compared to those in traditional positions.
If you have an epidural, your position options may be more limited because of reduced leg sensation and fall risk, which is one reason epidurals are associated with back-lying delivery. Side-lying is often the best alternative for people with epidurals who want to avoid the flat-on-back position.
Pain Management Options
Pain relief during labor falls into two broad categories: medications and non-drug techniques. Most people use some combination of both.
Epidural and Spinal Analgesia
An epidural is the most common form of medical pain relief during vaginal birth. A thin catheter is placed in the lower back, just outside the spinal cord’s protective membrane, and delivers continuous medication to numb sensation from roughly the waist down. Pain relief typically begins about 12 minutes after placement and can be maintained throughout labor.
A spinal block works faster, with pain relief starting in about 5 minutes, but it’s a single injection rather than a continuous feed. Spinal blocks last about 2 hours on average and are more commonly used for cesarean births or late in labor when delivery is imminent. Both methods carry a small risk of temporarily reducing leg movement, though this is uncommon with either approach.
Epidurals do extend the pushing stage. First-time mothers with an epidural push for an average of about an hour, compared to 36 minutes without one. They’re also associated with a higher likelihood of delivering on your back and a greater chance of needing an episiotomy.
Non-Drug Pain Relief
Several non-pharmacological techniques have evidence supporting their use during labor. Water immersion, whether in a bath or birthing pool, reduces pain perception, improves physical and psychological comfort, and has been shown to reduce blood loss during labor by improving circulation. Many hospitals and birth centers now offer tubs or showers for laboring women.
TENS (transcutaneous electrical nerve stimulation) uses small electrical pulses delivered through pads on the lower back to interrupt pain signals. It’s most effective during early labor and ranked among the top three non-drug methods for reducing labor pain intensity, alongside aromatherapy and acupressure. Deep, slow breathing techniques help by diverting attention from pain and promoting relaxation, and some studies link patterned breathing to shorter labor duration, though evidence for pain reduction specifically in the first stage is limited.
When Labor Is Induced
Sometimes labor doesn’t start on its own and needs to be medically initiated. Before induction, your provider assesses cervical readiness using five factors: how dilated the cervix already is, how thin it has become, its position, its firmness, and how far the baby’s head has descended into the pelvis. These are scored on a scale from 0 to 13. A score above 8 generally predicts a successful induction, while a lower score may mean your cervix needs to be “ripened” with medication or a mechanical device before contractions can be started.
Common reasons for induction include going past 41 or 42 weeks, broken water without contractions, or medical conditions that make continuing the pregnancy riskier than delivery. The process can take anywhere from several hours to a couple of days, depending on how ready your cervix is at the start.
What Happens Right After Birth
In the minutes after your baby is born, several things happen quickly. Your provider will likely place your baby directly on your chest for skin-to-skin contact. This hour after birth is a sensitive period when oxytocin activity peaks in both you and your baby, promoting bonding, calm, and breastfeeding initiation.
The umbilical cord is now recommended to be clamped no sooner than 30 to 60 seconds after birth. In the first 3 minutes, 80 to 100 milliliters of blood transfers from the placenta to your newborn, providing extra iron stores and blood volume that benefit the baby in the weeks ahead.
Delivering the placenta is usually managed actively by your care team, which helps reduce blood loss. Active management has been shown to lower average maternal blood loss at birth and reduce the likelihood of needing additional medication to control bleeding afterward.
When a Cesarean Becomes Necessary
Some births require a cesarean delivery, either planned in advance or decided during labor. Emergency cesareans are most commonly performed for a concerning fetal heart rate pattern, which carries 12 times the odds of requiring an emergency procedure. Umbilical cord prolapse (when the cord slips ahead of the baby) and suspected uterine rupture are other urgent reasons.
A cesarean can also become the safest option when labor stalls despite interventions, the baby is in a position that prevents vaginal delivery, or the placenta is blocking the cervical opening. About 1 in 3 births in the United States are cesarean deliveries, though rates vary significantly by hospital.