What signifies the start of the third stage of labor?

The start of the third stage of labor is signified by the birth of the infant. This stage follows the second stage, during which the baby is delivered. Once the baby is born, the body then transitions into the third stage, which involves the expulsion of the placenta. This stage is crucial as it ensures the complete removal of the placenta from the uterus to prevent complications such as postpartum hemorrhage. Recognizing the timing and events of each stage of labor is essential for ensuring the safety and health of both the mother and the newborn during delivery.