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Irregular periods
Irregular periods Menstrual cycles that vary more than a few days in length from month to month are considered irregular. Most menstrual cycles are about four weeks long, with the normal range between 24 and 35 days.
RELATED TERMS--------------------------------------
Menstrual
An endocrine cycle of 28 days in women which includes fluctuations in estrogen and progesterone, the events of enodmetrial development, follicular maturation, ovulation, changes in cervical mucus secretion, breast vascularization changes, and if pregnancy does not occur, menstruation.
SIMILAR TERMS--------------------------------------
PREVIOUS AND NEXT TERMS--------------------------------------
Intrauterine device
A small engineered piece of plastic or metal placed in a woman's uterus to prevent fertilization.
Intrauterine growth retardation
Slow growth of a fetus in the womb possibly resulting in a low birth weight baby.
Intraventricular hemorrhage
Bleeding into the ventricles or the brain, common in premature infants.
Invasive
Medical tests that involve gaining entry into the body via a needle, tube, or hand.
Iron
A mineral in the body that works with protein to make hemoglobin, essential for the blood.
Irregular periods
Isolette
Similar to an incubator.
Ibotenic acid
Substance used in lesion studies. Destroys cell bodies of neurons but leave axons in tact.
Iconic memory
Short-lived visual sensory memory which lasts about 500 msec. Disrupted by masking (i.e. by a bright light). Tied to anatomical coordinates.
Interocular motion display
A motion display in which the motion stimulus in each eye of the observer is ambiguous, yet perception of coherent motion is possible if the subject combines motion information from both the eyes.
Isomorphistic approach
Belief that perceptual variations in the visual filed must be accounted for by analogous variations of neural activity. Roughly speaking, the neural distribution should look like the percept.
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