Giving birth is a multi-stage process in which the uterus contracts to open the cervix, push the baby through the birth canal, and then deliver the placenta. The average labor lasts 12 to 24 hours for a first birth and 8 to 10 hours for subsequent births, though the experience varies widely depending on pain management choices, the baby’s position, and whether delivery is vaginal or surgical.
How Labor Starts
Labor begins when the body releases prostaglandins and oxytocin, two hormones that work together to kick things off. Prostaglandins soften and thin the cervix by breaking down its structural tissue, while oxytocin triggers rhythmic contractions of the uterine muscle. These contractions start mild and irregular, then gradually become stronger, longer, and closer together. Some people also notice a “bloody show” (a small amount of mucus tinged with blood) or a gush of fluid when the amniotic sac ruptures, though the water doesn’t always break on its own before labor is well underway.
The First Stage: Cervix Opens
The longest part of labor is the first stage, when contractions slowly open the cervix from closed to 10 centimeters. This stage can last anywhere from 12 to 19 hours and has two distinct phases.
During early labor, the cervix dilates to about 6 centimeters. Contractions are typically manageable, often feeling like strong menstrual cramps. This phase lasts roughly 6 to 12 hours, and many people spend it at home, walking, resting, or timing contractions. Providers consider early labor prolonged if it stretches past 20 hours for a first-time birth.
Active labor picks up intensity significantly. The cervix dilates from 6 to 10 centimeters, contractions come every 2 to 3 minutes, and this phase typically lasts 4 to 8 hours. Near the end of active labor, many people experience a period sometimes called “transition,” where contractions are at their most intense and closely spaced. This is often the most physically demanding stretch, but it’s also the shortest, usually signaling that pushing is close.
Pain Management Options
Most people choose some form of pain relief during labor, though the options range from breathing techniques to regional anesthesia.
An epidural is the most common medical pain relief for vaginal birth. A thin catheter is placed in the epidural space just outside the fluid-filled sac surrounding the spinal cord, and medication flows through it continuously or on demand. It takes about 10 to 20 minutes to start working, numbs the lower body while keeping you awake, and can be adjusted throughout labor. A spinal block works faster, delivering a single dose of medication directly into the spinal fluid for near-immediate effect, but it’s typically reserved for cesarean deliveries because it can’t be topped up over time the way an epidural can.
Non-medical approaches include movement and position changes, warm water immersion, massage, nitrous oxide (inhaled gas), and focused breathing. Some people combine several of these with a lower-dose epidural.
The Second Stage: Pushing and Delivery
Once the cervix is fully dilated, the pushing stage begins. This can last anywhere from 30 minutes to several hours. Providers consider it prolonged if it exceeds 3 hours without an epidural or 4 hours with one for a first birth.
During this stage, the baby makes a series of movements to navigate through the pelvis and birth canal. The baby’s head first tucks chin to chest (flexion), then rotates to fit through the narrowest part of the pelvis. As the head reaches the vaginal opening, it extends backward, and the widest part of the head passes through, a moment called “crowning.” After the head emerges, the baby rotates one more time so the shoulders can slip out one at a time, and the rest of the body follows quickly.
Throughout labor, the baby’s heart rate is monitored. Most commonly, a small ultrasound device is strapped to the abdomen to track the heartbeat externally. If the signal is hard to read, a tiny electrode can be placed on the baby’s scalp once the cervix is at least 3 centimeters open and the membranes have ruptured. This gives a more direct reading.
Assisted Vaginal Delivery
Sometimes the second stage stalls or the baby shows signs of distress, and delivery needs to happen faster than pushing alone can achieve. In these cases, a provider may use a vacuum extractor (a soft cup attached to the baby’s head with gentle suction) or forceps (curved instruments that cradle the baby’s head) to help guide the baby out during a contraction. Both tools are only used when the baby’s head is already low in the birth canal and the cervix is fully open, so minimal force is needed. Vacuum extraction is generally avoided before 34 weeks of pregnancy because of increased risk to the baby’s developing blood vessels.
The Third Stage: Delivering the Placenta
After the baby is born, the uterus continues to contract to detach the placenta from the uterine wall. Three signs indicate that separation has happened: the uterus contracts and becomes more rounded at the top, there’s a gush of blood from the vagina, and the umbilical cord visibly lengthens. The placenta is usually delivered within 6 to 10 minutes after the baby, following just 2 to 3 more contractions. A provider may gently press on the lower abdomen or apply light traction on the cord to help it along.
Cesarean Delivery
About 1 in 3 births in the United States happen by cesarean section. A cesarean may be planned in advance (for reasons like the baby’s position or a previous cesarean) or decided during labor if complications arise.
The procedure is done under regional anesthesia, usually a spinal block, so you’re awake but numb from the chest down. The surgeon makes a horizontal incision just above the pubic bone, then works through several layers of tissue: skin, a layer of fat, the tough connective tissue covering the abdominal muscles, and the lining of the abdominal cavity. The abdominal muscles themselves are separated rather than cut. Once the uterus is visible, the surgeon makes a low horizontal incision through all three layers of the uterine wall, opens the amniotic sac if it hasn’t already ruptured, and lifts the baby out. The placenta is removed, and then each layer is closed. The entire delivery typically takes about 10 to 15 minutes from the first incision, though closing everything up takes longer.
Recovery from a cesarean is more involved than a vaginal birth. Most people spend 2 to 4 days in the hospital, and full recovery of the abdominal incision takes about 6 weeks. Walking and light movement are encouraged within the first day to reduce the risk of blood clots.
What Happens Right After Birth
Immediately after delivery, the baby is usually placed skin-to-skin on the birthing parent’s chest. Current guidance supports waiting at least 30 to 60 seconds before clamping the umbilical cord, and emerging evidence suggests waiting 2 minutes or longer offers meaningful benefits, particularly for preterm babies. For babies born before 37 weeks, delaying cord clamping by at least 2 minutes is associated with a 69% reduction in the odds of death before hospital discharge compared to clamping within 15 seconds. For very preterm babies (born before 32 weeks), delayed clamping also reduces the need for blood transfusions.
The baby is assessed for breathing, heart rate, muscle tone, reflexes, and skin color within the first few minutes. For vaginal births, the provider checks for any tears in the vaginal tissue and repairs them with dissolvable stitches if needed. The uterus is monitored to make sure it’s contracting firmly, which controls bleeding. Most people who deliver vaginally without complications can go home within 24 to 48 hours.