Queensland court rules on rare case of twins with different biological parents

A woman in Queensland, Australia, gave birth to twins with different biological parents, a rare occurrence that challenged existing state surrogacy laws. The woman, whose identity remains protected by the court, became pregnant naturally at approximately the same time an embryo from another couple was transferred to her via in vitro fertilization (IVF) as part of a surrogacy agreement.

The two children were born via cesarean section on the same day in November 2025. While there were no disputes regarding custody, the case required intervention from the Queensland Children's Court because surrogacy laws typically do not allow for the separation of siblings born from the same pregnancy.

The court ultimately ruled that although the children are “gestational twins,” they do not qualify as “children born from the same pregnancy” under the specific legal definitions of surrogacy law. This distinction allowed the biological parents of the girl to be officially recognized as her legal parents, enabling each child to be raised by their respective biological families.