🩺 Unicornuate Uterus: A Rare Müllerian Anomaly

A unicornuate uterus is a rare congenital Müllerian anomaly that develops when only one Müllerian duct develops normally.

As a result, the uterus is smaller than usual and typically has a single functional uterine horn.

In some women, a rudimentary horn may also be present.

🤔 Why Does a Unicornuate Uterus Matter?

Although many women with a unicornuate uterus can conceive naturally, this condition is associated with increased reproductive and obstetric risks.

These may include:

• Early pregnancy loss

• Second-trimester pregnancy loss

• Preterm birth

• Fetal malpresentation, particularly breech presentation

• Fetal growth restriction

• Increased cesarean delivery rates

However, having a unicornuate uterus does not mean that pregnancy complications are inevitable.

Many women achieve successful pregnancies.

⚠️ An Important Consideration: Rudimentary Horn

Some women with a unicornuate uterus have an associated rudimentary horn.

A non-communicating rudimentary horn containing functional endometrium may be associated with:

• Severe dysmenorrhea

• Chronic pelvic pain

• Hematometra

• Endometriosis

A particularly serious complication is rudimentary horn pregnancy.

Although rare, pregnancy within a rudimentary horn can result in uterine rupture and life-threatening intra-abdominal hemorrhage.

Early recognition is therefore essential.

🔎 How Is a Unicornuate Uterus Diagnosed?

Accurate diagnosis is important for reproductive counseling and pregnancy planning.

3D transvaginal ultrasound can help assess the uterine cavity and external uterine contour.

MRI may provide additional anatomical details, particularly when a rudimentary horn is suspected or ultrasound findings are inconclusive.

Women with a unicornuate uterus may also have associated renal tract anomalies.

Renal tract imaging is therefore recommended to assess for associated urinary system abnormalities.

🤰 Pregnancy and Obstetric Care

Pregnancy management should be individualized according to the patient's reproductive history and clinical findings.

Depending on the circumstances, care may include:

• Early confirmation of pregnancy location

• Assessment for an associated rudimentary horn

• Surveillance for fetal growth restriction

• Monitoring for preterm birth risk

• Assessment of fetal presentation before delivery

• Individualized delivery planning

❤️ The Key Message

A unicornuate uterus does not prevent a woman from becoming pregnant or having a healthy baby.

However, understanding the anatomy and recognizing potential complications are essential.

With appropriate diagnosis, individualized surveillance, and obstetric care, many women achieve successful pregnancy outcomes.

Dr Rabab Cares 🌷

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