When the endometrium reaches 9mm, there will usually be a menstrual period in the next 1 to 2 weeks.
A woman’s ovaries secrete estrogen, which causes the endometrium to thicken gradually. When the follicle in the ovary grows and matures, there will be ovulation, and the ovarian corpus luteum can be formed after ovulation.
The corpus luteum of the ovary secretes estrogen and progesterone, and under the action of estrogen, the endometrium continues to thicken, and 1 week before menstruation, the thickness of the endometrium reaches the thickest stage in the entire menstrual cycle. At this time, the thickness of the endometrium can reach 1cm or even 1.5cm.
When the endometrium reaches 1cm, it usually enters the luteal phase, which is the post ovulatory phase of the menstrual cycle. At this time, if there is no fertilized egg to bed, the endometrium will atrophy in the ovarian corpus luteum, estrogen and progesterone levels drop, peeling bleeding, menstruation occurs. Therefore, when the endometrium reaches 9mm, menstruation can usually occur in 1 to 2 weeks.
If endometrial abnormality is found in the examination, it is recommended to consult a doctor in time, complete the relevant examination, clarify the cause of the disease under the guidance of the doctor, and carry out targeted treatment.