The Air Force Safety Center is a Field Operating Agency with headquarters at Kirtland Air Force Base, N.M.
The Finnish researchers are unsure why the use of a pacifier might lead to an ear infection, but theorized it may have something to do with the change in pressure equilibrium inside the ear caused by the sucking.
In a large number of cases, sexually transmitted diseases (e.g., Chlamydia or PID), pelvic infection or inflammation (e.g., salpingitis) cause adhesions that can block a tube. In most cases, adhesions are the primary cause, or are intimately involved in tubal occlusion.