Polycystic refers to polycystic ovary syndrome, menstruation delayed for more than a month endothelium 6mm considerations and polycystic is not related to, may be related to premature ovarian failure, abnormal prolactin levels, multiple uterine operations, and so on. 1. Premature ovarian failure: if the patient’s ovarian function decreases prematurely, it will lead to low estrogen levels in the body, which will lead to a thin lining. 2. For patients with high levels of prolactin, it will further inhibit the function of the female reproductive axis, thus inhibiting follicular growth and development, and low levels of estrogen will lead to thinning of the lining. 3. If the patient has more abortions, removing the ring and other operations, it will damage the endothelial tissue and lead to endothelial thinning. Delayed menstruation for more than a month endothelium 6mm indicates that the endothelium is still relatively thin, polycystic is due to irregular ovulation or non-ovulation, which leads to the lack of progesterone antagonism in the body, and then estrogen continues to stimulate the endothelium hyperplasia, so the patient’s menstruation delayed the endothelium is mostly thicker. For women with delayed menstruation and thin endothelium, it is recommended to improve the sex hormone and other related examinations to clarify the cause of the disease and then actively treat under the guidance of the doctor.