fetal viability


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fetal viability

fetal viability

The ability of a fetus to survive outside of the womb. Historically, a fetus was considered to be capable of living at the end of gestational week 20 when the mother had felt fetal movement (quickening) and the fetal heart tones could be auscultated with a fetoscope. In actuality, even with prompt and intensive neonatal support, a preterm fetus of less than 23 weeks' gestation has little chance of surviving outside of the womb.
See: viable
References in periodicals archive ?
Wade on a "collision course with itself" as technology would inevitably push fetal viability back earlier and earlier in pregnancy.
The researchers repeated the experiment in order to determine the effects on fetal viability at birth, again comparing maternal mice who were vaccinated with Moderna's mRNA vaccine and maternal mice who received placebo.
With these data, the rate of resorption (number of resorptions x 100/number of implantations); rate of post-implantation loss (number of implantation--number of live fetuses x 100/number of implantations); fetal viability (number of live fetuses x 100/number of implantations) and the placental index (placental weight/fetal weight) were calculated.
It focuses on the decision to prolong somatic support of the mother's vital functions in order to reach fetal viability.
One of the potentially serious obstetric problem that tends to threaten fetal viability, neonatal mortality and morbidity and maternal health and wellbeing is placental abruption 15.
However, the conceptualisation of fetal viability in law is problematic, since the term generally fails to capture the essence of what viability means in a clinical setting.
Wade that a woman has a constitutional right to an elective abortion prior to fetal viability.
The percentage of post-implantation loss (number of implantations minus the number of live fetuses x 100 / number of implantation) and the rate of fetal viability (number of fetuses x 100 / number of implantations) were calculated.
Usually surgical intervention is necessary regardless of fetal viability.
Obstetric ultrasound documented fetal viability with a crown rump length consistent with 13 weeks' gestation and a heart rate of 155 beats per minute.
Fetal viability is discouraging and majority of fetus died prior to surgery in utero.
22The pregnancy complicated by PROM before the limit of fetal viability (currently by 23 weeks) is at increased risk for fetal death (15%); however a portion of this increase is attributed to non- intervention for fetal benefit when delivery occurs before there is no hope of postnatal survival.