The three stages of birth are labor (when contractions open the cervix), pushing and delivery of the baby, and delivery of the placenta. The first stage is by far the longest, often lasting many hours, while the third stage typically wraps up within minutes. Here’s what happens in your body during each one and what the experience feels like.
Stage 1: Labor and Cervical Dilation
The first stage begins when you start having regular contractions and ends when your cervix is fully dilated to 10 centimeters. Your cervix needs to do two things during this stage: thin out (called effacement) and open wide enough for the baby’s head to pass through. This is the longest stage of birth, and it’s divided into two phases that feel quite different from each other.
Early Labor
Early labor covers the stretch from your first regular contractions up to about 6 centimeters of dilation. Contractions during this phase are typically spaced about every five to seven minutes, and many people describe them as similar to strong menstrual cramps. This phase can last anywhere from several hours to more than a day, especially for a first baby. It’s generally manageable enough that you can move around, eat lightly, and rest between contractions at home.
Active Labor
Once dilation reaches about 6 centimeters, you’re in active labor. Contractions become stronger, closer together (roughly three to five minutes apart), and more painful. This is when most people head to the hospital or birth center if they haven’t already. Your cervix dilates from 6 centimeters to the full 10, and the pace picks up considerably compared to early labor.
The final stretch of active labor, sometimes called transition, is the most intense part. Contractions may come every two to three minutes and last over a minute. Many people feel shaky, nauseous, or overwhelmed during transition. The good news is it’s also the shortest phase, often lasting 30 minutes to two hours. Once your cervix reaches 10 centimeters, you’re ready to push.
A key hormone driving this entire stage is oxytocin. When the baby’s head presses against your cervix, nerve signals travel to your brain and trigger your pituitary gland to release oxytocin into your bloodstream. That oxytocin stimulates uterine contractions, which push the baby further into the cervix, which triggers even more oxytocin. This feedback loop is what causes contractions to steadily increase in strength and frequency as labor progresses.
Stage 2: Pushing and Birth
The second stage starts at full dilation and ends when the baby is born. This is the active pushing stage. Contractions continue every two to five minutes, lasting about 60 to 90 seconds each, but they now serve a different purpose: helping you move the baby down through the birth canal. You push during contractions and rest between them.
For first-time mothers, pushing typically lasts up to three hours. If you’ve given birth before, this stage is often shorter, usually under two hours. An epidural can add time because it reduces the sensation that helps guide your pushing effort.
As the baby descends, you’ll feel intense pressure in your pelvis and rectum. Many people describe an overwhelming urge to bear down. The baby’s head eventually becomes visible at the vaginal opening, a moment called crowning, which often brings a burning or stretching sensation. Once the head is delivered, the rest of the body usually follows within the next contraction or two.
Stage 3: Delivery of the Placenta
After the baby is born, the placenta still needs to come out. This third stage is the shortest, and many people are so focused on their newborn that they barely notice it happening.
Contractions resume about five to 30 minutes after birth. These contractions cause the uterine wall to shrink and thicken, creating a shearing force that peels the placenta away from the uterine lining. Separation usually starts at one edge and spreads across. As the uterus continues to contract, the placenta drops into the lower part of the uterus and then into the vagina. You may notice a gush of blood as it descends. The placenta is usually delivered after two to three contractions, typically within 6 to 10 minutes of the baby’s birth.
Your care provider may ask you to give a gentle push to help the placenta along. Oxytocin continues to play a central role here, stimulating the uterine contractions that separate the placenta and then clamping down on blood vessels at the placental site to control bleeding.
If the placenta hasn’t been delivered within 30 minutes (when the process is being actively managed) or 60 minutes (when it’s left to happen on its own), it’s considered retained. A retained placenta needs medical attention because it can cause heavy bleeding.
How Long the Whole Process Takes
Total labor time varies enormously. For a first baby, the combined three stages commonly run 12 to 18 hours, though anything from 6 to over 24 hours falls within the normal range. Subsequent births tend to be faster, often 6 to 10 hours total. The first stage accounts for the vast majority of that time. Pushing may take anywhere from 20 minutes to a few hours, and the placenta usually arrives within 10 to 30 minutes after that.
These numbers are averages, not deadlines. Labor that progresses slowly isn’t automatically a problem, and labor that moves quickly isn’t automatically better. What matters is that both you and the baby are tolerating the process well.
The Immediate Postpartum Period
Some providers refer to the first 6 to 12 hours after delivery as a “fourth stage.” Technically it isn’t one of the three stages of birth, but it’s worth knowing about because it’s a critical monitoring window. During this time, your care team watches for changes in blood pressure, heart rate, and bleeding. Your uterus continues to contract and firm up, which helps seal off the blood vessels where the placenta was attached. You may feel cramping, especially during breastfeeding, since nursing triggers additional oxytocin release that helps the uterus shrink back down.