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spontaneous abortion |
Also found in: Dictionary/thesaurus, Medical, Legal, Acronyms, Wikipedia, Hutchinson | 0.01 sec. |
miscarriageor spontaneous abortionSpontaneous expulsion of an embryo or fetus from the uterus before it can live outside the mother. More than 60% are caused by an inherited defect in the fetus, which might result in a fatal abnormality. Other causes may include acute infectious disease, especially if it reduces the fetus's oxygen supply; abnormalities of the uterus that have physical or hormonal origins; and death of the fetus from umbilical-cord knotting. The main sign of impending miscarriage is vaginal bleeding. spontaneous abortion [spän′tā·nē·əs ə′bȯr·shən] (medicine) An unexpected, premature expulsion of the fetus. Also known as miscarriage. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Pregnancies that fail in the first trimester-ones that end in embryonic or fetal death or in incomplete spontaneous abortion, ones whose inevitable outcome is spontaneous abortion and ones characterized by the absence of an embryo in the gestational sac-traditionally have been managed with dilation and curettage. Winter and Hokanson (1964) indicated that spontaneous abortion may not be a significant effect of chronic nitrate exposure at levels sufficient to induce methemoglobinemia in cattle. Emerging uses include tests for diagnosing spontaneous abortions or designing personalized versions of brand-name drugs that could increase their effectiveness. |
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