Stages of Labor

Core Concepts

First stage: dilation — with latent, active, and transition phases

The first stage is the longest. It begins when contractions become regular and produce cervical change, and it ends at full dilation.

• Latent phase: contractions are mild and often irregular; cervical change is slow, with dilation in the early range (commonly described as up to several centimeters). The person is usually alert, talkative, and able to move about. This phase can be long and is often spent at home.
• Active phase: contractions become stronger, more frequent, and more regular, and dilation advances more rapidly. Definitions of exactly where active labor begins vary among sources and institutions — current guidance commonly describes active labor as starting around six centimeters — and the nurse follows the facility's definitions. The person becomes more focused and less conversational.
• Transition phase: the final stretch to full dilation. Contractions are at their strongest and closest together. The person may feel overwhelmed, irritable, nauseated, shaky, and may say things like "I can't do this" — which is usually a sign that the phase is peaking, not that anything is wrong. The urge to push may begin before the cervix is fully dilated; if it does, the nurse coaches breathing through it until the provider confirms full dilation.

Second stage: pushing and birth

The second stage runs from full dilation to the birth of the newborn. As the presenting part descends, the fetal head undergoes the cardinal movements — engagement, descent, flexion, internal rotation, extension, external rotation, and expulsion — which is the fetus's way of navigating the passageway described in the previous topic. The person feels a strong urge to push, though the urge may come and go. Upright or side-lying positions, gravity, and coached breathing support effective bearing-down. The nurse watches for crowning (the fetal head visible at the introitus and not receding between contractions), supports the perineum, prepares the birth field, and calls the provider as birth approaches. This stage may be brief or prolonged; fetal response to pushing is monitored throughout.

Third stage: the placenta

The third stage begins at the birth of the newborn and ends with delivery of the placenta. After birth the uterus contracts firmly, and the placenta separates from the uterine wall. Classic signs of separation include a lengthening of the umbilical cord, a small gush of blood, and a rise of the fundus as the placenta moves down. The placenta is delivered, and the provider and nurse inspect it for completeness — a retained fragment is a risk factor for later bleeding, so the membranes and maternal surface are checked. Meanwhile, newborn care is already underway: the newborn is dried, warmed, and placed skin-to-skin, and cord clamping is timed per provider decision and institutional policy.

Fourth stage: immediate recovery

The fourth stage covers roughly the first hour or two after delivery of the placenta. The body begins a rapid reversal of the changes of pregnancy and labor: vital signs stabilize, the uterus stays firmly contracted (a boggy uterus signals the need for intervention), and lochia — the postpartum vaginal discharge — is assessed for amount and character. The nurse checks the fundus, lochia, perineum, and voiding at regular intervals, monitors vital signs, and supports early bonding and feeding. This is also the period of highest risk for postpartum hemorrhage, which is why the frequent checks in this stage are not routine busywork — they are surveillance. (Postpartum care is covered in depth in its own chapter.)

Common Confusions