Final answer:
A breech presentation describes a birth position where the baby's buttocks or feet are positioned to be delivered first. Breech deliveries are uncommon and most are delivered via Caesarian section in modern medical practices for safety.
Step-by-step explanation:
A breech presentation indicates that the presenting part is the lower extremities or buttocks. In fewer than 5 percent of births, the infant is oriented in a breech presentation, with either the buttocks or feet positioned to be delivered first. There are different types of breech presentations such as complete breech, where both legs are crossed and oriented downward, and frank breech, where the legs are oriented upward. Historically, vaginal delivery was common for breech positions, but contemporary practices often necessitate a Caesarian section to safely deliver the infant.