The endometrium during ovulation is usually 8~10mm thick, and 13mm is on the thick side, which is not normal. As the follicle grows to its maximum volume during ovulation, the level of estrogen produced at this time also reaches its first peak, which acts on the endometrium to stimulate its proliferation, the thickness of the endometrium at this time is mostly around 8~10mm, so 13mm is on the thick side. If a woman’s endometrium is too thick during ovulation, it will also affect the fertilization of the egg, thus affecting the normal pregnancy, so it is necessary to follow the doctor’s instructions to carry out hysteroscopy, except for endometrial lesions. For the examination found that ovulation endometrial thickening of women, it is recommended that they go to a regular hospital gynecology consultation, clear the cause of the disease under the guidance of the doctor to actively treat, so as not to affect the normal pregnancy.