Fact-finding survey on Dysphoric milk ejection reflex（D-MER） in Japan

Abstract

The dysphoric milk ejection reflex (D-MER) is a condition known to cause discomfort in nursing mothers just before the ejaculation reflex. However, there has been limited research on D-MER in Japan and internationally, and its current status remains unclear.
The results of this survey indicated that the incidence of D-MER was 1.6%. The most common times for discomfort awareness were “within 1 week postpartum” and “within 1 month postpartum.” The discomfort typically occurred “just before milk secretion,” “immediately after milk secretion,” and “during direct breastfeeding.” The discomfort lasted for 1–2 minutes. Half of the mothers who were aware of D-MER discontinued breastfeeding, and many of those distressed by D-MER had not consulted anyone.
Although hormonal dynamics are speculated to play a role, the underlying basis remains unclear, making appropriate support difficult to provide.