For forceps delivery, the fetal head should be engaged and the position of the vertex known with certainty.
Answer
true
Explanation
Both conditions are listed as prerequisites for forceps delivery. Knowing the position supports correct blade application, while engagement indicates that the head has passed into the pelvis sufficiently for the planned procedure. Uncertainty about position or a high, unengaged head makes safe application inappropriate.\n\n**Key takeaway:** Confirm engagement and position before forceps application.\n\n**Glossary:** **Vertex**: The crown or upper part of the fetal head presenting in a cephalic presentation; **engagement**: Passage of the presenting part through the pelvic inlet.