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Fetal viability is the ability of a human fetus to survive outside the uterus. Viability depends upon factors such as birth weight , gestational age, and the availability of advanced medical care . In low-income countries , more than 90% of extremely preterm newborns (less than 28 weeks gestational age ) die due to a lack of said medical care ...
Fetal viability refers to a point in fetal development at which the fetus may survive outside the womb. The lower limit of viability is approximately 5 + 3 ⁄ 4 months gestational age and is usually later. [20] There is no sharp limit of development, age, or weight at which a fetus automatically becomes viable. [21]
A pregnancy that lasts 41 weeks up to 42 weeks is called late-term and a pregnancy longer than 42 weeks is called post-term. [10] The general consensus is that a fetus is viable at 24 weeks, however, a live birth may occur earlier in gestation with the assistance from neonatal intensive care unit (NICU) resources.
The chance of survival at 22 weeks is about 6%, while at 23 weeks it is 26%, 24 weeks 55% and 25 weeks about 72% as of 2016. [189] With extensive treatment up to 30% of those who survive birth at 22 weeks survive longer term as of 2019. [190] The chances of survival without long-term difficulties is less. [24]
It would have made abortion legal until fetal viability, which is generally considered to be around 23 to 24 weeks. ... Indexes trade mixed as rally wavers ahead of key inflation data. Finance ...
[2] However, the older a fetus is when its mother becomes brain dead, the greater its chance for survival. Research into preterm births indicates that "a fetus born before 24 weeks of gestation has a limited chance of survival. At 24, 28 and 32 weeks, a fetus has approximately a 20–30%, 80% and 98% likelihood of survival with a 40%, 10% and ...
Moore and Persaud's book defines fetal viability on page 103, but does not make any claim about it being defined as survival without medical intervention. The relevant sentence is, "Viability is defined as the ability of fetuses to survive in in the extrauterine environment (i.e., after a premature birth)."
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