Definition:
The term micropreemie usually refers to a premature baby who is less than 800 grams (1 pound 12 ounces) or younger than 26 weeks at birth.
Survival rates of micropreemies depend on gestational age:
- 22 weeks gestation: About 10% of infants survive
- 23 weeks gestation: About 1/2 of infants survive
- 24 weeks gestation: About 2/3 of infants survive
- 25 weeks gestation: About 3/4 of infants survive
Although all micropreemies are very underdeveloped at birth and require constant medical care, many grow up with no long term effects of prematurity.

