Premature Birth: Chances of Baby Survival

Premature Birth: Chances of Baby Survival

A premature birth occurs before 36 weeks and occurs in 12% of pregnancies. Early-term is between 37-38 weeks, and full-term is 39 and beyond. Over the past decades, survival for preterm babies has increased dramatically due to improvements like assisted ventilation (lungs develop later in pregnancy). It’s a marvel that even babies born at 22 weeks still have a shot at survival. What are the specific chances of survival for each week of pregnancy? How likely is a baby to survive at 24 weeks, vs 26 weeks, and 28 weeks?