What is the normal presentation of the infant at birth?

The correct answer refers to the typical position of a fetus during delivery, which is the cephalic presentation. In a cephalic presentation, the infant's head is positioned down toward the birth canal, making it the most favorable and common position for childbirth. This position allows for a smoother delivery, as the head is usually the first part to enter the birth canal, followed by the shoulders and the rest of the body.

In contrast, the breech presentation occurs when the baby is positioned to come out buttocks or feet first, which can lead to complications during delivery and often necessitates special management or a cesarean section. The term "sagittal" refers to an anatomical plane and is not relevant to the context of presentation at birth. The term "frank breech" describes a specific type of breech presentation where the baby's buttocks are positioned to deliver first, with the legs folded at the knees and the feet near the head. While this is a recognized presentation, it is not the normal or common presentation at birth compared to the cephalic position.