A–Z Glossary

Sleep-disordered breathing

A group of sleep-related breathing problems involving snoring, gasping, or repeated pauses in breathing.

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Blue light and sleep impact

Blue light and sleep impact

How blue light affects the sleep-wake system Blue light is the short-wavelength end of the visible spectrum. It is not inherently harmful in daytime; in fact, natural morning light helps anchor circadian timing and supports alertness. The issue arises when blue-enriched light is delivered late in the evening, after the brain has started to prepare […]

Is insomnia dangerous for pregnancy

Is insomnia dangerous for pregnancy

What insomnia means in pregnancy Insomnia is more than simply being tired. It usually means difficulty falling asleep, staying asleep, or waking too early, together with daytime impairment such as fatigue, poor concentration, irritability, or reduced ability to function. In pregnancy, some sleep fragmentation is expected because the body is changing rapidly, but persistent insomnia […]

What surprises most women

What surprises most women

The first surprise: pregnancy may not feel obvious Many women expect pregnancy to announce itself clearly, but early pregnancy can be clinically nonspecific. Breast tenderness, fatigue, bloating, nausea, urinary frequency, food aversions, and mood changes may appear before or around the expected period. These can also occur with premenstrual hormonal shifts, stress, viral illness, thyroid […]

Signs the Daily Schedule Has Too Much Sleep

Signs the Daily Schedule Has Too Much Sleep

What “Too Much Sleep” Means in a Baby There is no single sleep total that defines too much sleep for every baby. Newborns commonly sleep in fragmented periods across the day and night, while older infants gradually develop longer nighttime intervals and more consolidated naps. Illness recovery, a growth phase, vaccination, travel, disrupted nighttime sleep, […]

Child wakes up at night and early waking explained

Child wakes up at night and early waking explained

What counts as normal waking during the night? Sleep is not perfectly continuous. Children, like adults, cycle through lighter and deeper stages, and they may briefly rouse between cycles. A child who turns over, mutters, opens their eyes, or calls out once and then settles again may simply be showing normal sleep fragmentation rather than […]

Sleepovers and bedtime routines away from home

Sleepovers and bedtime routines away from home

Why familiar routines matter Children do not need a perfect bedtime ritual to sleep well, but they do tend to sleep more easily when the steps before bed are predictable. The value of a bedtime routine is partly behavioral and partly physiological: repeated cues, such as washing, brushing teeth, reading, and lights dimming, help shift […]

Travel sleep tips for children crossing time zones

Travel sleep tips for children crossing time zones

Why children get jet lag Jet lag happens when the body’s internal timing system is out of sync with the local day-night cycle. The circadian rhythm in children, like in adults, is organized by the brain’s timekeeping network and influenced by light, meals, activity, and sleep timing. When a child crosses several time zones, those […]

Structuring evening time and transitioning from day

Structuring evening time and transitioning from day

Why evening transitions matter Evening is a biologic and behavioral transition, not just a clock time. During the day, children use substantial cognitive effort to follow instructions, inhibit impulses, manage peer interactions, and tolerate sensory stimulation. By late afternoon or evening, the prefrontal systems that support planning, impulse control, and flexible shifting may be relatively […]