A pregnancy in a non-communicant rudimentary horn is a rare but serious complication. Patients with bicornuate uterus non-communicating have an increased risk of obstetrical complications, such as abortion, intrauterine growth restriction, and fetal demise. Uterus bicornuate non-communicant rudimentary horn (UBNCRH) is a rare malformation of the uterus. The presence of uterus bicornuate noncommunicant rudimentary horn poses a great challenge for a gynecologist because that occurs due to the transperitoneal migration of the sperm or the zygote during the implantation period and the Muellerian anomalies are often asymptomatic. We report a case of 28-year-old female with a twin dichorionic diamniotic pregnancy with pain and vaginal bleeding in the 16 weeks of gestation with a UBNCRH.