功能失调性子宫出血(dysfunctionaluterinebleeding ,DUB ,以下简称功血) ,是由于调节生殖的神经内分泌机制失常引起的异常子宫出血,而不伴有全身及内外生殖器官器质性病变。诊断功血时必须与生殖道局部病变或全身性疾病所导致的生殖道出血相鉴别1　生殖道肿瘤1 1　黏膜下子宫 Dysfunctional dysfunctional uterine bleeding (DUB, hereinafter referred to as dysfunctional uterine bleeding), is due to abnormal regulation of reproductive neuroendocrine mechanisms caused by abnormal uterine bleeding, without systemic and internal and external genital organ disease. Diagnosis of dysfunctional uterine bleeding must be associated with local disease or systemic disease caused by genital tract bleeding phase 1 reproductive tract tumors 1 1 submucosal uterus