Pregnancy after treatment
A vanishing twin occurs when a twin pregnancy is seen on an early scan but one sac or embryo stops developing and is gradually reabsorbed, leaving a single ongoing pregnancy. Light bleeding may occur. The remaining pregnancy usually continues normally, though the experience can bring a real sense of loss.
Also known as: vanishing twin syndrome
Related South Africa guides
Sources
- ESHRE guidelines and patient information
Last reviewed: 8 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.