Is luteinizing hormone needed for optimal ovulation induction?

The role of luteinizing hormone in the natural menstrual cycle is not disputed. There are, however, a variety of opinions regarding the potential role of exogenous luteinizing hormone in ovulation induction and whether it is actually needed. The recent introduction into clinical practice of recombinant gonadotropins has been paralleled by recent advances in the knowledge of the endocrine and paracrine mechanisms that regulate human folliculogenesis. On this basis, this review analyses whether or not all patients need luteinizing hormone for follicular growth stimulation. In addition, new opportunities for improved treatment are considered as a result of the availability of recombinant human luteinizing hormone both in patients with ovulatory disorders and those undergoing multiple follicular development for assisted reproduction.