Final answer:
The normal fetal presentation, considered to be ideal for a vaginal birth, is occiput anterior.
Step-by-step explanation:
The normal fetal presentation is occiput anterior, which is the vertex presentation associated with the greatest ease of vaginal birth.
In occiput anterior presentation, the fetus faces the maternal spinal cord and the occiput (the back of the head) exits the birth canal first.
This presentation is considered to be most common and ideal for a vaginal birth.