How is uterine bleeding caused?

Hematometrium is medically called uterine effusion. There are many reasons for uterine effusion. The reasons for uterine effusion are different at different ages. Clinically, the most common is postmenopausal women showing uterine effusion. Estrogen levels decrease during this period. Uterine vagina shows atrophy. Adhesions may occur in the cervix. When doing B-ultrasound, it may be found that there is uterine effusion. If this kind of situation of uterine fluid, must also judge clearly, is not at the same time combined with endometrial lesions, need to carry out further detection. If in menopause shows uterine fluid, this time to judge, is in the menstrual cycle when the fluid, if just after menstruation, do B ultrasound found uterine fluid, this time may be menstrual blood has not been completely clean. If after menstruation clean, very long-term performance of uterine fluid, this time to consider, is there some endometrial lesions, cervical adhesions and uterine malformations caused by these problems of uterine fluid.