What does abnormal uterine shape mean?

Jul 03, 2025 Source: Cainiu Health
Dr. Zhang Lu
Introduction
In general, uterine morphological abnormalities typically refer to irregularities in the size, shape, position, or structure of the uterus. Uterine morphological abnormalities may affect a woman's reproductive function, for example, increasing the risk of infertility, miscarriage, or preterm birth. The specific impact varies depending on the type and severity of the abnormality and requires comprehensive evaluation combining imaging examinations such as ultrasound and magnetic resonance imaging (MRI) with clinical symptoms.

Generally, abnormal uterine morphology refers to abnormalities in the size, shape, position, or structure of the uterus. A detailed explanation is as follows:

Abnormal uterine morphology indicates a deviation from the normal anatomical shape of the uterus, which no longer presents the standard inverted pear-like structure. This can be caused by various factors. For example, congenital developmental abnormalities such as didelphys uterus or septate uterus result from abnormal development of the uterus during embryonic stages. Acquired factors, such as uterine fibroids—particularly large intramural or submucosal fibroids—can cause localized protrusions or overall enlargement of the uterus, thereby altering its shape. In cases of adenomyosis, displaced endometrial tissue infiltrates the uterine muscle layer, leading to uniform enlargement and increased firmness of the uterus, which also changes its morphology. Additionally, previous uterine surgeries, such as cesarean section or myomectomy, may leave scars on the uterus, affecting its shape.

Abnormal uterine morphology may impact female reproductive function, for example, increasing the risks of infertility, miscarriage, or preterm birth. The specific impact varies depending on the type and severity of the abnormality. Comprehensive evaluation combining imaging examinations such as ultrasound or magnetic resonance imaging (MRI) and clinical symptoms is necessary to determine the underlying cause and formulate an appropriate management plan.

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