[The diagnosis of a pseudo-unicornous uterus. Apropos of a pregnancy in a rudimentary uterine horn].

The following is a report of an unusual case of a patient who had a rupture of the rudimentary horn at 21 weeks of pregnancy. Hysterography had shown that she had a unicornuate uterus but she had not had a laparoscopy. Later ultrasound pictures at the beginning of pregnancy failed to reveal that the pregnancy sac was ectopic. The authors also stress the absolute need to carry out laparoscopy in cases of unilateral Müllerian hypoplasia. They show how to read ultrasounds in cases of pregnancies in rudimentary horns. They try to point out the best procedures for diagnosis using the literature.