How would the decrease in fetal heart rate during contraction be classified?

A decrease in fetal heart rate during contractions is referred to as early deceleration. This classification is based on the timing of the heart rate changes in relation to uterine contractions. Early decelerations occur when the fetus's heart rate slows down as the contraction begins and typically returns to baselineish levels as the contraction ends. This pattern is usually associated with head compression, which is a normal physiological response during labor.

In contrast, late decelerations occur after a contraction has peaked and can indicate issues such as fetal distress due to uteroplacental insufficiency. Moderate variability refers to the degree of fluctuation in the fetal heart rate, which is considered normal when the fetus is well-oxygenated. Marked variability signifies a significant fluctuation and can sometimes indicate fetal compromise. Understanding these distinctions is crucial for monitoring fetal well-being during labor and delivery.