Locked twins

Locked twins is a term used in obstetrics to describe a rare and serious complication during the birth of twins. This occurs when the chin of the second twin locks over the occiput of the first twin, making it difficult for both babies to be delivered vaginally.

Causes

The exact cause of locked twins is not known, but it is thought to be related to the position of the babies in the uterus. It is more likely to occur if the first twin is in a breech position (bottom first) and the second twin is in a vertex position (head first).

Diagnosis

Locked twins can be diagnosed during labor by a physical examination or ultrasound. The healthcare provider may feel the chin of the second twin locked over the occiput of the first twin. An ultrasound can confirm the diagnosis.

Complications

Locked twins can lead to serious complications for both the mother and the babies. These can include prolonged labor, fetal distress, and birth asphyxia. In some cases, it may be necessary to perform a cesarean section to deliver the babies safely.

Treatment

The treatment for locked twins depends on the specific circumstances. If the condition is diagnosed early in labor, it may be possible to manually manipulate the position of the babies to unlock them. This is known as external cephalic version. If this is not successful, a cesarean section may be necessary.

Prognosis

The prognosis for locked twins depends on the severity of the condition and the timing of the diagnosis. With early diagnosis and appropriate treatment, the outcome for both babies can be good. However, if the condition is not diagnosed or treated promptly, it can lead to serious complications.

See also

• Twin
• Multiple birth
• Obstetric complications