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Hemi-Uterus and Pregnancy Management

Obstetric care in unicornuate uterine anomaly

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Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Kadın Hastalıkları ve Doğum department. Book Appointment →

What is Hemi-Uterus and Pregnancy Management?

Unicornuate uterus develops from incomplete fusion or unilateral agenesis of one Müllerian duct, resulting in a single banana-shaped horn with one fallopian tube.

Approximately 65 percent of unicornuate uteri have a rudimentary horn (communicating, non-communicating with cavity, or non-cavitary) which can cause complications.

Renal anomalies coexist in 30–40 percent of cases, particularly ipsilateral renal agenesis, due to shared embryonic origin.

The uterine cavity volume is approximately half of normal, and uterine blood supply is asymmetric and reduced.

Pregnancy complications are common: miscarriage (about 36 percent), preterm birth (around 20 percent), malpresentation, IUGR, cesarean delivery and rare uterine rupture in rudimentary horn pregnancy.

Symptoms

Often asymptomatic until pregnancy or fertility evaluation
Cyclic pelvic pain if non-communicating rudimentary horn with functional endometrium causes hematometra
Dysmenorrhea, dyspareunia
Recurrent miscarriages, second-trimester loss
Preterm labor or preterm premature rupture of membranes
Abnormal fetal lie or presentation in late pregnancy
Severe abdominal pain in rudimentary horn pregnancy (high risk of rupture)

Risk Factors

Genetic predisposition; most cases are sporadic without identifiable cause
Associated with ipsilateral renal anomaly (workup with renal ultrasound or MRI imperative)
Family history of Müllerian anomaly is uncommon but possible
Higher rates of pregnancy loss with each conception
Increased ectopic pregnancy risk if rudimentary horn implantation

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Pre-conception counseling for known unicornuate uterus
  • Severe cyclic pelvic pain in adolescents (suggests obstructed rudimentary horn)
  • Recurrent miscarriages or second-trimester loss
  • Preterm contractions or rupture of membranes
  • Abnormal fetal lie at 36 weeks (transverse, breech)
  • Acute abdominal pain in pregnancy (rudimentary horn rupture risk)
  • Reduced fetal movements or growth concerns

Treatment Methods

01
Confirm diagnosis by 3D transvaginal ultrasound, MRI or hysteroscopy plus laparoscopy
02
Concurrent renal imaging to detect ipsilateral renal anomaly
03
Pre-pregnancy: laparoscopic excision of non-communicating rudimentary horn with functional endometrium to prevent ectopic pregnancy and pain
04
Antenatal care: increased frequency of visits, careful cervical assessment with serial ultrasound, growth monitoring
05
Cervical length surveillance; cerclage considered if shortening (less than 25 mm before 24 weeks)
06
Counsel on warning signs: contractions, vaginal bleeding, decreased fetal movements
07
Steroids for fetal lung maturity if preterm labor risk
08
Plan delivery: cesarean for malpresentation, prior cesarean or non-reassuring fetal status; vaginal birth possible with cephalic presentation
09
Monitor for postpartum hemorrhage due to abnormal uterine architecture
10
Long-term: counsel about future pregnancy risks; contraception planning between pregnancies

Which Department to Visit?

You can visit our Kadın Hastalıkları ve Doğum department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.