"Lung maturity" refers to the stage when a baby's lungs are fully developed and ready for breathing outside of the mother's womb.
Full definition
Most importantly, ACOG states induction should not occur prior to 39 weeks or verification of
fetal lung maturity, which differs from its previous recommendation of 37 weeks.
Assessment of fetal
lung maturity.
If your C - section is planned before 39 weeks for a non-emergency reason, your baby's
lung maturity might be tested before the C - section.
If a mother is at risk of premature birth, her baby's
lung maturity will be assessed and steroids can be given to the mom if there is a suspected issue.
The biggest problem is
lung maturity — at this stage, some babies will have trouble getting enough oxygen or breathing on their own, and might require medical intervention.