1 White fence bracket made of durable, low-maintenance vinyl. 2  Use with 1 1/2 in. thick Veranda vinyl fence panels.  Use to attach vinyl fence panels to posts.
Late Decelerations (labor and delivery). A âdecelerationâ describes a decrease in the heart rate of the fetus from its baseline heartrate. âLate decelerationsâ are described as a transient decrease in the fetal heart rate occurring at or after the peak of a uterine contraction. Late decelerations may represent some degree of utero-placental insufficiency. All blood flow in and out of the intravillious space stops briefly during a contraction.
Early in gestation the fetal heart rate is predominately under the control of the sympathetic nervous system and arterial chemoreceptors [1]. As the fetus develops its heart rate decreases in response to parasympathetic (vagal stimulation) nervous system maturation and variability becomes more pronounced [2]. sinusoidal pattern has regular amplitude and frequency and is excluded in the definition of variability. A sinusoidal pattern has a smooth, undulating pattern, lasting at least 10 minutes with a fixed period of three to five cycles per minute and an amplitude of 5-15 bpm. Short-term variability is usually absent. [6].