Good day to you! Have you ever encountered such a condition as a hip d…

Good day to you! Have you ever encountered such a condition as a hip dislocation? My husband's sister has this diagnosis (she has two completely healthy daughters). She started worrying because her right knee sometimes makes a crunching sound, and I am worried if it is hereditary. The pediatrician knows our family history and will send us for an examination by a pediatric orthopedist. But I would like to hear from those who have experienced something similar.