[Poor ovary response to the controlled ovarian hyperstimulation].

One of the greatest challenges in clinical reproductive endocrinology is assessment of patients who respond badly to exogenous gonadotropins in controlled ovarian hyper stimulation (COH). Low response is a result of diminished ovarian reserve. Identifying potential low responders is of critical clinical importance. This paper will review varies form of "poor response" definition and a series of tests to analyses in order to discover a patient's ovarian functional reserve.