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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 ...
Gestational age is the time that has passed since the onset of the last menstruation, which generally or as standard occurs 2 weeks before the actual fertilization. Embryonic age, in contrast measures the actual age of the embryo or fetus from the time of fertilization. Nevertheless, menstruation has historically been the only means of ...
Viability (fetal) Español: Existe una vesión en español, aquí: File:Prenatal_development_table_(es).svg Português: Versão em português: File:Prenatal development table pt.svg
Hence, the gestational timing of a fetal toxin exposure, fetal drug exposure or vertically transmitted infection can be used to predict the potential consequences to the fetus. Estimated date of delivery; Scheduling prenatal care; Estimation of fetal viability; Calculating the results of various prenatal tests, (for example, in the triple test).
Even in states where abortion is legal, many restrict the procedure after 'fetal viability.' Here's what that means and why some abortions happen later in pregnancy.
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]
[8] [9] Preterm fetuses switch from fetal circulation to postnatal circulation before the left ventricle is completed, resulting in an unusually large left ventricular structure with 3-dimensional geometry. [10] Preterm or being large for gestational age increases the risk of atrial fibrilliation, or rapid, irregular heart rhythm, later in life ...
In human medicine, parity is the number of pregnancies carried by a female for at least 20 weeks (duration varies from region to region, 20 – 28 weeks, depending upon age of viability). If a female carries the fetus to viable age, even if ultimately the fetus is born deceased, this still counts as an instance of parity, as parity is based on ...