Placental villi invading through the serosa of uterus falls under category of
Variants of the morbidly adherent placenta are classified by the depth of trophoblastic growth.Placenta accreta indicates that villi are attached to the myometrium. With placenta increta, villi actually invade the myometrium, and placenta percreta defines villi that penetrate through the myometrium and to or through the serosa.Reference: Reference: William's Obstetrics; 25th edition; Chapter 41; Obstetric hemorrhage
Placenta pre
Placenta accreta
Placenta increta
Placenta percreta
General obstetrics