Uterine sacculation is a very rare pregnancy complication having an incidence of about one in 3000 pregnancies. It is more commonly associated with retroverted uterus. Isolated sacculation either congenital or acquired is very rare. Without timely intervention, this can cause miscarriage, intrauterine fetal death, preterm delivery, uterine rupture, adherent/retained placenta and postpartum hemorrhage. Retained placenta is a common complication of congenital sacculation. Acquired sacculation occurs secondary to uterine surgeries, like uterine curettage, hysterotomy, cesarean section or following misoprost use. A rare case of retained placenta in the congenital uterine sacculation, first diagnosed during laparotomy done for failed manual removal of placenta, which was removed by hysterotomy. Another case with failed induction of abortion for intrauterine fetal demise and threatened rupture of acquired sacculation are reported.Awareness and early diagnosis of uterine sacculation allows clinicians to be prepared for emergency situations and better manage complications, to limit fetomaternal morbidity and mortality.Abbreviations: IUGR: Intrauterine growth restriction; IUFD: Intrauterine fetal death.