The third stage of labor begins immediately after the birth of the baby and ends with the delivery of the placenta and fetal membranes. This phase carries the highest physiological risk for the mother due to the constant threat of postpartum hemorrhage (PPH), which remains a leading cause of maternal mortality across Nigeria. During a physiological or passive third stage, the placenta separates spontaneously through the shearing of the decidua spongiosa layer, relying entirely on natural uterine contractions and maternal clotting mechanisms.
Active Management of the Third Stage of Labor, universally known as AMTSL, is a bundle of three distinct clinical interventions designed to accelerate placental separation and actively control uterine bleeding. By replacing a passive approach with timely prophylactic measures, midwives can drastically reduce blood loss and prevent primary PPH. Implementing AMTSL routinely is standard evidence-based practice for every facility-based birth, regardless of whether the mother is considered low risk on admission.
The cornerstone of AMTSL is the timely administration of a uterotonic drug to stimulate forceful, rhythmic uterine contractions. Oxytocin is the golden standard and drug of choice because it acts rapidly, has minimal side effects, and is generally safe for all mothers.
Administer the chosen uterotonic within one minute of the baby's birth. Always confirm by abdominal palpation that a second twin is not hiding inside the uterus before giving the medication.
Controlled cord traction, abbreviated as CCT, helps deliver the separated placenta smoothly while minimizing the risk of cord snapping or uterine inversion. Midwives must never pull on the umbilical cord blindly or forcefully without prior signs of placental separation and adequate uterine contraction.
The final step of the AMTSL bundle involves immediate and ongoing assessment of the uterine tone. As soon as the placenta and membranes are delivered, gently massage the uterine fundus through the mother's abdominal wall until the muscle becomes firm and well-contracted.
A soft, boggy uterus indicates uterine atony, which fails to compress open maternal blood vessels at the placental site and leads directly to excessive bleeding. Midwives should palpate the fundus every fifteen minutes during the first hour after birth. If the uterus feels relaxed during these checks, immediately perform firm circular massage and encourage the infant to suckle at the breast to stimulate natural oxytocin release. Never leave a newly delivered mother without checking her uterine tone regularly.
The clinical effectiveness of AMTSL relies heavily on strict adherence to proper timing and sequence. Giving the uterotonic medication too late—such as after the placenta has already been delivered manually—loses the preventative window against atony. Conversely, pulling on the cord before the uterotonic has taken effect increases the risk of tearing the umbilical cord or causing inversion.
By ensuring oxytocin is given within one minute of birth, combining it with controlled cord traction, and maintaining vigilance through fundal massage, midwives successfully manage the physiological transition. When any single step is omitted or mistimed, the risk of primary postpartum hemorrhage escalates significantly, turning a normal physiological event into a dangerous obstetric emergency.
Even with perfect execution of AMTSL, complications such as partial placental separation, retained placental fragments, or persistent bleeding can arise. If the placenta fails to deliver within thirty minutes of oxytocin and CCT, suspect a retained placenta and prepare for manual removal under aseptic technique and anesthesia.
Accurate record keeping is an essential component of professional midwifery practice. The midwife must document the exact time of delivery, the specific uterotonic drug and dose administered, the time of placental expulsion, the completeness of the placental membranes and cotyledons, and the estimated blood loss. Clear documentation protects the mother's health record and provides a legal account of the immediate postpartum care provided.