early deceleration in fetal heart rate monitoring, a transient decrease in heart rate that coincides with the onset of a uterine contraction. late deceleration in fetal heart rate monitoring, a transient decrease in heart rate occurring at or after the peak of a uterine contraction, which may indicate fetal hypoxia.
DIFFERENCES:   Internal regulators only respond only to the inside, while external  regulators respond only to the outside.   SIMILARITIES:   Both internal and exâ¦ternal regulators can stop their processes.
Alternator - Internal vs external regulator. Discussion in 'Classic Mustang Specific Tech' started by u0061914, Mar 1, 2010. Ok, I need a little assistance. I'm doing a v8 conversion on my 67. I have most everything done already, but I need to replace the current alternator. The odd thing is that no external regulator exists on this car.