What does crowning signify during childbirth?

Crowning is a significant stage in the childbirth process that indicates the baby's head is visible at the vaginal opening. This visibility suggests that the birth of the baby is imminent, meaning it is about to occur very shortly. When the baby's head is seen at the opening, it is a clear signal that delivery is nearing completion, which is why this option is correct.

Other options discuss different aspects of childbirth but do not accurately capture the meaning of crowning. While full dilation of the mother does occur prior to crowning, the presence of the baby's head at the vaginal opening specifically indicates that the birth is about to take place. Similarly, a visible umbilical cord may seem related, but it does not indicate the same immediacy as crowning. Lastly, any indication of distress, while critical in monitoring the baby's well-being, does not pertain to the specific moment of crowning.