Typically, clinicians think of ectopic pregnancies as occurring outside of the uterus. This case is important in underscoring the fact that there are variants of ectopic pregnancies that exist within the uterus. One classic type is the cornual ectopic pregnancy, which occurs in a congenital bicornate uterus. The shape of this uterus may allow for implantation to occur high in one of the cornual limbs.
A 31-year-old, who is gravida 2 para 1 at 6 weeks by last menstrual period, presents for vaginal bleeding starting approximately 5 days earlier. The bleeding was initially light, and there was no associated abdominal pain. The bleeding seemed to stop when she laid down and increased upon standing.