RT Journal A1 Seibel MM, Hann L T1 PRegnancy and an iud in separate horns of a bicornate uterus JF JAMA JO JAMA YR 1982 FD February 12 VO 247 IS 6 SP 753 OP 754 DO 10.1001/jama.1982.03320310017011 UL http://dx.doi.org/10.1001/jama.1982.03320310017011 AB To the Editor.—  Müllerian abnormalities occur frequently in nature. However, it is thought that they are only clinically important in about one third of cases.1 For this reason these abnormalities often go undetected. This case represents what we believe is the first report of a simultaneous intrauterine device (IUD) and an intrauterine pregnancy (IUP) in a bicornate uterus diagnosed by ultrasound. It serves to illustrate how a previously undetected uterine anomaly could have led to an unnecessary operative procedure and emphasizes the value of ultrasound in the management of early pregnancy.Report of a Case.—  A 22-year-old woman, gravida 2 para 2, had regular monthly periods until seven weeks before admission. One week before admission vaginal spotting and left lower abdominal cramping developed, which had gradually increased in intensity during the previous 24 hours. She complained of mild nausea but no other symptoms. Her medical history was unremarkable other