dysfunctional uterine bleeding
noun [ U ] medical specialized uk/dɪsˌfʌŋk.ʃənəl ˌjuː.tər.aɪn ˈbliːd.ɪŋ/ us/dɪsˌfʌŋk.ʃən.əl ˌjuː.t̬ɚ.ən ˈbliː.dɪŋ/ (abbreviation DUB)
功能失调性子宫出血
bleeding from the vagina that is not regular or normal and is not due to infection, pregnancy, or a tumour
Dysfunctional uterine bleeding is usually caused by abnormal changes in hormone levels. 功能失调性子宫出血通常是由于荷尔蒙水平的不正常变化引起的。