What is the difference between a low ovarian response and low ovarian quality?

A low ovarian response is defined as the retrieval of 3 or fewer eggs after puncturing a patient who is undergoing hormonal stimulation in IVF/ICSI cycles. In contrast, ovarian quality essentially relates to an egg’s potential to produce a healthy, competent embryo. Among others, morphological characteristics are the criteria used to assess egg quality, although age is a crucial clinical factor.