At the age of 52, menstruation stopped for half a year and came again, which is caused by ovarian decline, not absolute amenorrhea, but disorderly menstruation. If you have a period again, we recommend an ultrasound examination to understand the condition of the uterine appendages and the endometrium after it is clean. If the endometrium is thin, there is no echogenicity or no menstruation, it is normal and can be observed. Generally speaking, when a woman enters the perimenopausal period, she will experience menstrual disorders, and it is normal for her to have a period once every three months, half a year or once a year, as long as there is no abnormal uterine bleeding or dripping. However, if menstruation stops for six months and comes again, and the ultrasound indicates that the endometrium is thicker and the echogenicity is uneven, it is recommended to have regular hysteroscopy and endometrial biopsy to exclude endometrial lesions.