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They sleep on average more during this time compared to pre-pregnancy sleep time. [1] [2] Total sleep time, however, decreases as the pregnancy progresses. [5] Nocturia and musculoskeletal discomfort account for the physiological factors impacting sleep during the first trimester. [2] Subjectively, women report an increase in night-time ...
The most commonly observed sleep disorders in pregnant women include insomnia, obstructive sleep apnea, and restless legs syndrome. [18] The American Academy of Sleep Medicine has officially recognized 'pregnancy-associated sleep disorder' as a distinct condition, encompassing both insomnia and increased daytime sleepiness occurring during ...
The timing of sleep in humans depends upon a balance between homeostatic sleep propensity, the need for sleep as a function of the amount of time elapsed since the last adequate sleep episode, and circadian rhythms which determine the ideal timing of a correctly structured and restorative sleep episode. The homeostatic pressure to sleep starts ...
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Pregnancy symptoms may be categorized based on trimester as well as region of the body affected. Each pregnancy can be quite different and many people do not experience the same or all of the symptoms. If a person is concerned about their symptoms they should be encouraged to speak with an appropriate healthcare professional. [2]
It is during the third trimester that maternal activity and sleep positions may affect fetal development due to restricted blood flow. For instance, the enlarged uterus may impede blood flow by compressing the vena cava when lying flat, a condition that can be relieved by lying on the left side.
Generally speaking, fetal motility can be classified as either elicited or spontaneous, and spontaneous movements may be triggered by either the spine or the brain. Whether a movement is supraspinally determined can be inferred by comparison to movements of an anencephalic fetus. [2] This article primarily deals with voluntary and reflex movements.