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Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
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Any substance that can cause
developmental abnormalities in the embryo or fetus
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Teratogen
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Examples of teratogens - 5
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Pharmaceuticals, alcohol/smoking/drugs,
infection, radiation, maternal disease
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Medications with known teratogencity - 5
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Thalidomide, accutane, tetracycline,
coumadin, antidepressants
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Hazards of smoking during pregnancy
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Placenta previa, placental abruption,
low birthweight/prematurity
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What happens with oxygen during smoking
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Carbon monoxide binds with hemoglobin
instead of oxygen
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Marijuana causes
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Tremors and startle reflexes in
newborns
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Cocaine causes
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Vasoconstriction to the uterus and
cocaine addiction in babies
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Illnesses causing damage (STORCH) - 7
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syphilis, toxoplasmosis, rubella,
cytomegalovirus, herpes, measles, mumps
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Radiation as teratogen
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High ionizing radiation (ie gamma rays)
can cause death for fetus and newborn. Lower doses cause congenital
abnormalities and growth retardation and cancer.
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Does UV radiation affect fetus?
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No
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Etiology of harm due to teratogen
exposure depends on:
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Timing of exposure – very early or
very late is less harmful
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First two weeks:
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Embryo has not implanted yet and result
of teratogen exposure may be minimal
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Weeks 2-5:
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CNS, eye, and limb buds may be affected
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Weeks 4-7:
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CNS, heart, eye, ear, limbs,
mouth/teeth may be affected
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Weeks 6-10:
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CNS, heart, limbs, senses, digestive
system, genitalia
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