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RU-486
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.
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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.
Blocking
A sudden obstruction or interruption in spontaneous flow of thinking or speaking, perceived as an absence or deprivation of thought.
Progesterone
A hormone produced in response to luteinizing hormone (LH) released from the pituitary gland. It is required to flush out the uterus if an egg is not fertilized. It is also useful for stimulating the growth of new bone mass.
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Respiratory distress syndrome
Common in premature infants, RDS means a baby can't take in enough oxygen because his or her lungs aren't yet fully developed. With proper treatment, about 80 percent of babies recover fully.
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
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.
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
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