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Rubella
Rubella A mild, highly contagious viral disease that can cause serious birth defects if a pregnant woman is afflicted. Women who haven't had it should make sure they're immunized before conception.
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Contagious
Easily transmitted by direct or indirect contact.
Disease
Illness or sickness often characterized by typical patient problems (symptoms) and physical findings (signs). Disruption sequence: The events that occur when a fetus that is developing normally is subjected to a destructive agent such as the rubella (German measles) virus.
Conception
When a sperm and egg join to form a single cell, usually in the Fallopiantubes. After joining, the fertilized egg travels into the uterus, where itimplants in the lining on its way to growing into an embryo and then a fetus.
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Rubeola
A type of measles that can lead to serious complications and death.
Rubex
Rubex is a prescription or over-the-counter drug which is (or once was) approved in the United States and possibly in other countries. Active ingredient(s): doxorubicin hydrochloride.
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Rh incompatibility
A condition in which a baby's blood type is incompatible with the mother's. If carefully monitored and treated, women whose Rh factor is incompatible with their fetus's will usually give birth to a healthy baby.
Rooming-in
When a newborn stays in the same room as the mother in a hospital after birth.
Rooting reflex
One of the reflexes present at birth; infants will automatically turn their heads and start sucking when their cheeks are stroked.
Roseola infantum
A common viral illness in children under 2, roseola infantum begins with a high fever, runny nose, and swollen glands, usually followed by a rash on the torso, arms, or legs. While the infection is common, serious complications from roseola infantum are rare.
RU-486
An abortion-inducing pill, RU-486 works by blocking the action of progesterone, which is vital for maintaining a pregnancy. Effective only during the first seven weeks of pregnancy or up to five weeks after a missed period.
Rubella
Receptive field
Area of the retina and visual space that when stimulated produces a change in the response rate of a neuron.
Reflectance
The fraction of incident light that is reflected toward the eye by an object.
Reflection densitometry
Technique applied to the living eye to study photopigments. Measures the light reflected from the fundus (i.e. not absorbed by any pigments).
Retinal
Light-absorbing portion of rhodopsin. The absorption of light causes retinal to change from 11-cis to 11-trans configuration
Retinal layers
Retinal layers are: Outer nuclear layer - Contains photoreceptors; Inner nuclear layer - Contains bipolar, horizontal and amacrine cells; Ganglion cell layer - Contains ganglion cells; Outer plexiform layer - Contains processes of receptor, bipolar and horizontal cells; Inner plexiform layer - Contains processes of bipolar, amacrine and ganglion cells.
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