Option d) The nadir of the deceleration coincides with the acme of the contraction.
The slowdown meets three conditions to be considered early: As the contraction commences, the FHR slows down; as the contraction reaches its peak, the nadir, the deceleration reaches its lowest point; and as the contraction comes to a close, the deceleration ceases.
According to their form and timing in relation to uterine contractions, fetal decelerations are divided into three groups (e.g., early, late, and variable).
For instance, early decelerations are brought on by the baby’s head being compressed during uterine contractions. The vagal stimulation brought on by the compression decreases the fetal heart rate.
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