Can a unicornuate uterus cause fetal arrest?

　　Fetal arrest usually refers to fetal demise. In general, a unicornuate uterus may lead to fetal demise. A unicornuate uterus is a type of congenital uterine malformation. During early pregnancy, it may affect the implantation of the fertilized egg, thereby leading to fetal demise. The specific analysis is as follows:

　　A unicornuate uterus develops when one Müllerian duct fully develops while the other fails to develop or forms only a rudimentary duct. The ovary and fallopian tube on the undeveloped side are often absent, resulting in a unicornuate uterus. Pregnancies in women with a unicornuate uterus are at higher risk of recurrent miscarriage, preterm birth, and premature rupture of membranes. Some patients may even be unable to conceive. Due to uterine abnormalities, embryonic development may also be compromised, such as restricted skeletal growth. Additionally, pregnant women with a unicornuate uterus are more prone to gynecological complications. If the uterus is stimulated and undergoes irregular contractions, it may result in fetal demise or preterm delivery.

　　The causes of fetal demise are complex and commonly include chromosomal abnormalities, infections, and immune factors. Uterine malformations are also among the contributing causes. Therefore, women with a unicornuate uterus should follow medical advice and undergo regular prenatal checkups during pregnancy. Ultrasound examinations should be performed promptly to monitor fetal growth and development. It is recommended that pregnant women enhance their nutritional intake, pay attention to supplementing vitamins and proteins, maintain a balanced diet, and seek immediate medical attention if any discomfort occurs.

　　Patients with a unicornuate uterus who become pregnant should promptly visit the hospital for evaluation. Under medical guidance, an ultrasound should be performed to confirm the exact location of the gestational sac and help prevent threatened miscarriage.