What is a Twinless Twin?
A twinless twin is a twin who has lost his or her sibling. This term is also used to describe other co-multiples, such as a triplet who has lost a sibling. Twinless twins are a topic of interest for some psychologists because their experiences are quite unique; even if the sibling dies in utero, a twinless twin often experiences psychological difficulties later in life which seem to be related to the loss of the co-multiple. In some cases, a twinless twin loses a sibling in utero, due to complications of the pregnancy. Even though the twins never meet in life, their co-development in the womb apparently leaves a strong mark, and many twinless twins in this situation report feelings of loss or incompleteness later in life. A twinless twin may actually guess that he or she had a sibling in the womb before this fact is revealed, suggesting that a very strong connection is forged between co-multiples, even at an early gestational age. One of the most common causes for a co-multiple to die
