After miscarriage, if you reach ovulation, the thickness of the endometrium is more than 8 mm. Because the thickness of the endometrium changes gradually throughout the menstrual cycle, some people will have normal ovulation within one month after miscarriage because of the thin endometrium after miscarriage, but some people will not ovulate. If the endometrium is healthy, you need to wait until you have a normal period after abortion and ovulate when your period is clean, then the endometrial thickness should be more than 8mm, if the endometrium is lower than 8mm, it may be caused by endometrial damage caused by abortion or by adhesions in the uterine cavity.