Final answer:
Occult cord prolapse involves the umbilical cord being visible externally, while overt cord prolapse involves the cord being beside or below the presenting part.
Step-by-step explanation:
The difference between occult and overt cord prolapse is that occult cord prolapse involves the umbilical cord being visible externally, while overt cord prolapse involves the cord being beside or below the presenting part. In occult cord prolapse, the cord is at risk of getting compressed or squeezed during delivery, which can lead to fetal distress. Overt cord prolapse is a more severe condition where the cord is fully exposed and can easily be compressed, cutting off the blood and oxygen supply to the fetus.