What does having a short cervix mean?

How short?: Short cervix only matters when it comes to pregnancy. If cervix is < than 2.5 cm long, there is increased risk of prematurity. Your OB can check for funneling of membranes into cervix early on, and after 24wks, do a test called fetal fibronectin. If this is positive and you have short cervix, your risk of prematurity is much higher, and your doctor may want to implement steps to reduce risk.