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.
Pressure Regulators in Operation. A pressure regulator is comprised of three functional elements. ) 1  A pressure reducing or restrictive element. Often this is a spring loaded poppet valve. ) 2  A sensing element. Typically a diaphragm or piston. )  A reference force element.