Stage One: Opening the Door
Labour begins with the first stage, when the cervix—the narrow neck of the uterus—shortens and opens. Early in this stage, contractions may arrive every 10 to 30 minutes, lasting about half a minute. Over time they grow stronger, longer, and closer together.
This stage has a latent phase, when contractions are regular but the cervix is only partly open, and an active phase, when dilation accelerates from roughly 5 cm to about 10 cm. The World Health Organization now defines active labour as starting later (around 5–6 cm), a shift intended to avoid rushing into unnecessary interventions.
Stage Two: The Descent
The second stage begins when the cervix is fully dilated. Now pressure builds in the pelvis, creating a powerful urge to bear down. The baby’s head, fully engaged in the pelvis, moves under the pubic arch and out through the vaginal opening.
As the head appears, or crowns, many women feel an intense burning or stinging. Some babies are born en caul, still wrapped in their amniotic membrane. Others emerge coated in a creamy substance called vernix, thought to protect the skin.
For first-time mothers, this stage is usually completed within three hours; for subsequent births, often within two. Longer second stages are tied to rising risks of infection, heavy bleeding, and tears.
Stage Three: Letting Go of the Placenta
The third stage runs from the baby’s birth to delivery of the placenta. Within about 10–12 minutes on average, the placenta separates from the uterine wall and is expelled. Active management—giving a uterotonic drug, gently pulling on the cord, and massaging the uterus—reduces the danger of postpartum haemorrhage.
Delaying clamping of the umbilical cord for at least a minute, or until pulsation stops, boosts the baby’s early haemoglobin levels and iron stores without increasing the mother’s bleeding risk.
Stage Four: The Invisible, Dangerous Weeks
The postpartum period, sometimes called the fourth stage, stretches about six weeks, and the World Health Organization considers it the most critical and neglected phase for mothers and newborns. The uterus shrinks back toward its pre-pregnancy size, hormones shift dramatically, and the baby’s organs adjust to life outside the womb.
During this time, most maternal and newborn deaths occur, yet monitoring often fades. But with vigilant observation, early skin-to-skin contact, and support for breastfeeding, these fragile weeks can become a safer bridge from pregnancy to parenthood.