Meconium is the poo you make in the womb but are not supposed to empty until after birth.
It represents bile
/swallowed hair & skin cells etc & is very sticky. If you poo before birth, usually due to stress
, the stuff can circulate in the bag of waters. If that material gets into your lungs before, during or after labor
it can cause lung disease. CF kids have poo that's too sticky & won't pass.