Successful triplet pregnancy in a patient with a unicornuate uterus with a cavitary communicating rudimentary horn

In a patient with primary infertility, ovulation was induced by monitored stimulation with human menopausal gonadotrophins (HMG) because of polycystic ovarian disease. Infertility work-up had shown a unicornuate uterus with a cavitary communicating rudimentary horn. The husband showed a varicocele-related moderate oligo-asthenoteratozoospermia. A triplet pregnancy occurred in a third HMG ovulation induction cycle combined with intra-uterine insemination of the husband's washed semen. The pregnancy was carefully monitored, and measures to prevent premature delivery were taken. Because of the patient's obvious discomfort in the presence of premature labour, Caesarean section was performed at 33 weeks gestation and three healthy infants were delivered. This is the first report of a successful triplet pregnancy in a women with a unicornuate uterus. The reproductive and obstetric outcome of this condition in general, and in the case of multiple pregnancy, is discussed.