Ultrasound evaluation of the ovarian hyperstimulation syndrome

282 cycles in 106 women going to be artificially inseminated at the AIED Center in Rome have been studied by means of ultrasound monitoring in order to evaluate the incidence of the ovarian hyperstimulation syndrome. In none of the patients, either in pharmacologically stimulated cycles (82 in 36 women) or in non stimulated cycles (200 in 70 women) moderate or severe hyperstimulation syndrome was reported. Only few mild cases occurred. In the non stimulated group only five cases with mild hyperstimulation occurred (2.5%). 31 pregnancies have been obtained (15.5% of all studied cycles). In the stimulated group 11 cases with signs of mild hyperstimulation occurred (13.4%) and 19 pregnancies were obtained (23.1%) of the stimulated cycles). No twin pregnancy was observed. The only molar pregnancy reported occurred in this group. All signs of hyperstimulation--either in stimulated cycles or in non stimulated patients--regressed spontaneously in the same cycle and anyhow they were not detected by ultrasound monitoring in the subsequent cycle.