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Snoring and sleep-disordered breathing are significantly more common in pregnant women, being 2–3 times more prevalent than in nonpregnant females. [30] These changes are associated with alterations in upper airway anatomy and tend to return to nonpregnant levels after childbirth. [30]
The exact cause of morning sickness remains unknown. Nausea and vomiting in pregnancy is typically mild and self-limited, resolving on its own by the 14th week of pregnancy. Other causes should also be ruled out when considering treatment. Initial treatment is typically conservative, and may include changes to diet and emotional support.
The patient is asked to nap for 20 minutes, and then is awakened. The nap process is repeated every 2 hours for a total of four or five times. The patient must remain awake for the entirety of the 2 hours between nap opportunities. The patient may be asked to fill out a post-test questionnaire.
The term polyphasic sleep was first used in the early 20th century by psychologist J. S. Szymanski, who observed daily fluctuations in activity patterns. [2] It does not imply any particular sleep schedule. The circadian rhythm disorder known as irregular sleep-wake syndrome is an example of polyphasic sleep in humans.
Prenatal care in the United States is a health care preventive care protocol recommended to women with the goal to provide regular check-ups that allow obstetricians-gynecologists, family medicine physicians, or midwives to detect, treat and prevent potential health problems throughout the course of pregnancy while promoting healthy lifestyles that benefit both mother and child. [1]
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The whole period normally proceeds in the order: N1 → N2 → N3 → N2 → REM. REM sleep occurs as a person returns to stage 2 or 1 from a deep sleep. [20] There is a greater amount of deep sleep (stage N3) earlier in the night, while the proportion of REM sleep increases in the two cycles just before natural awakening. [17]