Related Experiment Video
Updated: Feb 6, 2026
06:55
Assessment of Maternal Vascular Remodeling During Pregnancy in the Mouse Uterus
Published on: December 5, 2015
14.2K
Modifying Maternal Sleep Position in Late Pregnancy Through Positional Therapy: A Feasibility Study
Jane Warland1, Jillian Dorrian2, Allan J Kember3,4
1Mother's Babies and Families Research Group, School of Nursing and Midwifery, University of South Australia, Adelaide, South Australia, Australia.
Summary
A positional therapy device, PrenaBelt, significantly reduced supine sleep in pregnant women. This intervention improved maternal oxygen saturation and decreased fetal heart rate decelerations, suggesting potential maternal and fetal health benefits.
Area of Science:
- Obstetrics and Gynecology
- Sleep Medicine
- Maternal-Fetal Medicine
Background:
- Supine sleep position in late pregnancy is associated with adverse maternal and fetal outcomes.
- Positional therapy devices aim to mitigate risks by preventing supine sleep.
Purpose of the Study:
- To evaluate the efficacy of the PrenaBelt in reducing supine sleep time during the third trimester.
- To assess the impact of reduced supine sleep on maternal and fetal parameters.
Main Methods:
- A randomized, crossover in-home sleep study involving 25 healthy pregnant women (32-38 weeks gestation).
- Participants underwent two consecutive nights of monitoring: one control (no device) and one intervention (PrenaBelt worn).
- Monitoring included infrared video, maternal sleep (Watch-PAT200), and fetal well-being (Monica AN24).
Main Results:
- The PrenaBelt significantly reduced the proportion of time spent in the supine position (P=0.039).
- Maternal oxygen saturation increased (P=0.006), and fetal heart rate decelerations decreased (P=0.045) during intervention.
- No significant differences were observed in overall sleep time or maternal perception of sleep quality.
Conclusions:
- The PrenaBelt shows promise as an intervention to reduce supine sleep in late pregnancy.
- This reduction in supine sleep may lead to maternal and fetal health benefits.
- Further research is warranted to explore the links between sleep position, maternal respiratory function, and fetal outcomes.
Related Concept Videos
02:32Position-effect Variegation
7.1K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
7.1K
01:31Position and Displacement
26.4K
The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
26.4K
01:03Serial Position Effect
553
The serial position effect is a cognitive phenomenon where individuals are more likely to recall the first and last items in a list compared to those in the middle. This effect is divided into the primacy effect and the recency effect. The primacy effect is observed when the initial items in a list are remembered better. This occurs because these items are rehearsed more frequently or receive more elaborative processing, allowing them to be encoded into long-term memory more effectively. For...
553
01:29Position Vectors
2.0K
A position vector is a fundamental concept in mathematics that helps determine the position of one point with respect to another point in space. It is a vector that describes the direction and distance between two points. Position vectors are highly useful in the field of math and science, as they help represent spatial relationships and make calculations easier.
For instance, we want to locate a point P(x, y, z) relative to the origin of coordinates O. In that case, we can define a position...
For instance, we want to locate a point P(x, y, z) relative to the origin of coordinates O. In that case, we can define a position...
2.0K
01:11Anatomical Positions
20.4K
In anatomy, several standard anatomical positions are used as references for describing the position and orientation of different body parts. These positions help provide a common frame of reference when discussing anatomical structures. The anatomical position is the standard reference point for describing the body's position and orientation. In this position:
The body is upright, facing forward, and standing erect.
The feet are parallel and flat on the floor.
The arms are hanging by the...
The body is upright, facing forward, and standing erect.
The feet are parallel and flat on the floor.
The arms are hanging by the...
20.4K
00:58Positive, Negative, and Zero Work
22.2K
Work is done on an object when energy is transferred to the object. In other words, work is done when a force acts on a body that undergoes a displacement from one position to another. By definition, the work done by a force is the integral of the force with respect to the displacement along its path. Forces can vary as a function of position, and displacements can occur along various paths between two points. The magnitude of a force multiplied by the cosine of the angle that the force makes...
22.2K