Interaction between menstrual cyclicity and gonadotropin pulsatility.

Pulsatile gonadotropin secretion is a critical endocrine component of the regulation of the normal menstrual cycle. Pulsatile luteinizing hormone (LH) secretion changes dynamically across the menstrual cycle. Derangements of pulsatile LH secretion are found in virtually every menstrual disorder. This article summarizes the key features of pulsatile LH secretion in the normal menstrual cycle and in ovulatory disorders.