Fetus Emerging From the Head of Its Twin Sister Inside the Mother’s Womb + Ultrasound Image

Wednesday, May 13, 2026

Saed News: An extraordinary case of fetus-in-fetus has been recorded in China, in which a fetus was removed from the head of its living twin.

Fetus Emerging From the Head of Its Twin Sister Inside the Mother’s Womb + Ultrasound Image

According to SAEDNEWS, citing Mashregh, doctors at Fudan University in Shanghai noticed several abnormalities in a one-year-old girl, such as an abnormally large head and impaired motor skills. According to IFLScience, CT scans of the child’s head showed that her brain was under pressure. In addition, fluid accumulation had caused excessive enlargement in the brain’s ventricles.

Researchers during surgery discovered that the ventricular growth was actually the unborn twin of the child. Although most of the fetus was undeveloped, parts of the upper body and appendages such as fingers appeared to have formed.

Twins

Such cases are extremely rare in medical literature. Fetus-in-fetus cases occur in the early stages of twin pregnancy when the blastocyst (a cluster of dividing cells from the fertilized egg) does not separate properly.

As a result, one fetus becomes enclosed within the other. However, it should be noted that the enclosed fetus does not die; due to continuous blood supply from the twin, it remains “alive” but does not develop.

In this case report, it is stated that the one-year-old child recovered after surgery. Although the operation is highly complex, previous similar cases have also resulted in full recovery.