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fetal viability
Fetal viability or foetal viability is the ability of a fetus to survive outside the uterus.〔Moore, Keith and Persaud, T. (''The Developing Human: Clinically Oriented Embryology'' ), p. 103 (Saunders 2003).〕
==Definitions==
As the word is used in United States constitutional law since Roe v. Wade , viability is the potential of the fetus to survive outside the uterus after birth, natural or induced, when supported by up-to-date medicine. Fetal viability depends largely on the fetal organ maturity, and environmental conditions.〔(2012). Fetal Viability. () Available at: http://www.reference.md/files/D005/mD005328.html. (Accessed 15 November 2012 ).〕 Another definition for viability, as used in the medical phrase limit of viability, is the expectation that a fetus has an equal chance of surviving and not surviving outside his or her mother's womb.
According to Websters Encyclopedic Unabridged Dictionary of the English Language, viability of a fetus means having reached such a stage of development as to be capable of living, under normal conditions, outside the uterus. Viability exists as a function of biomedical and technological capacities, which are different in different parts of the world. As a consequence, there is, at the present time, no worldwide, uniform gestational age that defines viability.
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