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.