Final answer:
Delivery is imminent is NOT a reason for delivering the fetus at the scene in childbirth.
Step-by-step explanation:
In the case of delivering a fetus at the scene, the reason 'Delivery is imminent' is NOT a valid reason. The other three options - Maternal distress, Prolonged labor, and Fetal distress - are all valid reasons for delivering the fetus at the scene. 'Delivery is imminent' means that the birth is about to happen naturally and does not require intervention at the scene.