1 07/02/2015 Airport Authority adopts resolution to facilitate permitting for ride sharing at San Diego... 2  Read More. 3  06/19/2015 Airport Authority named âSustainability Champion of the Yearâ by North San Diego Business ...
The age of viability refers to the period of time when the developing fetus is able to survive outside of its motherâs womb. Generally, the age of viability of a fetus is considered to be between 22 and 26 weeks after conception. Survival of a child born prior to the full gestational age (40 weeks) improves greatly during the third trimester. The survival rates at different times during the age of variability are as follows: 21 weeks or less: survival rate is 0%.
This depends a great deal upon the state of medical knowledge and technology at a particular time and place. One hundred years ago, a child born at 30 weeks might have little chance of surviving. Today, 24 weeks is routinely quoted as the age of viability. I am not aware of any national statistics on how many premature babies of any given age manage to survive, but the following statistics are from a lecture by a doctor from the perinatal unit at a Dayton, Ohio hospital, for survival rates at that hospital.