Evidence of contralateral ovulation in ectopic pregnancy

Patients with an ectopic pregnancy were studied for documentation of the site of ovulation in order to determine the frequency with which controlateral ovulation and ovum transport occurs. Analysis of data on 135 patients in whom the site of ovulation was documented at the time of surgery and on 24 patients who were studied ultrasonically before surgery indicates that contralateral ovulation and ovum transport occurs in at least a third of ovulatory events.