Predetermination of ovulation timing by luteinizing hormone assay.

A modified rapid,solid-phase radioimmunoassay for serum luteinizing hormone requiring only 1 1/2 hours of incubation is presented. The method has been used to predetermine the time of ovulation in six infertile patients. Its advantages are presented in these cases. The simplicity and accuracy of the method make it practical, and it can serve well in the management of infertility.