limit of viability


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limit of viability

Pediatrics The minimum weight or age of a fetus that is compatible with extrauterine life; the LoV has been lowered by improved obstetric and neonatal interventions and aggressive resuscitation
Limits of Viability
Weeks of Gestation  22  23  24 25
Average birthweight (g) 490 592 695 761
Number stillbirths 7/29 4/40 0/34 0/39
Number 6-month survival/total  0/29  6/40 19/34 31/39
Days of hospital stay NA 120±23 107±37 76±23
Survival w/o cerebral defects 0% 12% 21% 69%
References in periodicals archive ?
This constituted a fundamental alteration of the governmental technology, which effectively transformed the lower limit of viability into a higher limit of the number of wolves that would be necessary to protect, as well.
For many decades the limit of viability was believed to be approximately 24 weeks of gestation.
Determining the limit of viability: Accurate dating is essential
The limit of viability is the milestone in gestation when there is a high probability of extrauterine survival.
Data on the limit of viability with large numbers of births between 22 and 24 weeks with early ultrasound dating would help to refine our understanding of the limit of viability.
Factors that influence the limit of viability include:
Gorillas, they suggest, already live on the limit of viability, foraging and eating for 8.8 hours a day, and in extreme conditions increasing this to as much as 10 hours a day.
In the Netherlands the accepted limit of viability has even been pushed upwards.
It is not a big operation and agricultural consultant Emyr Hughes, who is representing Mrs Jones and her daughters, said the permanent loss of 5.5% acres - plus another acre for drainage work - could push the farm beyond the limit of viability.
We are fast approaching the absolute limit of viability, and the limits of growth are becoming apparent.