Dysphoric milk ejection reflex (D-MER) is a condition in which people who breastfeed develop negative emotions that begin just before the milk ejection reflex and last less than a few minutes. It is different from postpartum depression, breastfeeding aversion response (BAR), or a dislike of breastfeeding. It has been described anecdotally many times, yet one of the earliest case studies on the condition was only published in 2011, and not much research was done prior to that. Even in 2021 when the first review of published literature was done the authors noted that health care providers were still "barely [able to] recognize D-MER."