Original: As NICU care has improved over the last 40 years , viability has reduced to approximately 24 weeks , -- in particular see TABLE 1 Survival and Neurologic Disability Rates Among Extremely Premature Infants although rare survivors have been documented as early as 21 weeks .
Simplified: As NICU care has improved over the last 40 years , viability has been reduced to approximately 24 weeks .