Is an endometrial thickness of 13mm normal?

Mar 03, 2025 Source: Cainiu Health

Dr. Zhang Lu

Introduction

The endometrium is a tissue layer lining the uterine cavity and undergoes cyclical changes during the menstrual cycle. If the endometrial thickness measures 13mm during the secretory or premenstrual phase, it is considered normal. However, if this thickness is observed during menstruation or shortly after the menstrual period, it indicates endometrial hyperplasia. If accompanied by symptoms such as irregular menstruation or heavy menstrual bleeding, the presence of pathological changes should be suspected, and prompt medical attention is recommended.

In general, whether an endometrial thickness of 13mm is considered normal depends on the individual's current stage of the menstrual cycle. The specific analysis is as follows:

The endometrium is a layer of tissue lining the inner wall of the uterus and undergoes cyclical changes throughout the menstrual cycle. If the endometrial thickness measures 13mm during the secretory phase or immediately before menstruation, it falls within the normal range and is generally not a cause for concern.

However, if this thickness is observed during menstruation or shortly after the menstrual period has ended, it may indicate endometrial hyperplasia. If accompanied by symptoms such as irregular menstrual cycles, heavy menstrual bleeding, or prolonged bleeding, there may be suspicion of endometrial pathology, and prompt medical evaluation and treatment are recommended.

In daily life, maintaining a healthy lifestyle and undergoing regular gynecological examinations can help in the early detection and management of potential abnormalities.

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