Identical (monozygotic) twins develop from a single egg-sperm combination that splits into two. If the split is delayed, usually a week or so after conception, the processes of growing a placenta, ...

Mono-mono twins are an incredibly rare type of identical twins who share both a placenta and an amniotic sac. While this makes for a high-risk pregnancy, advances in monitoring and treatment have ...

The 14th Congress of the International Society for Twin Studies The 2012 Congress of the International Society for Twin Studies was held in Florence, Italy, April 1-4, 2012. The official opening of ...

Doctors sometimes err in their diagnosis of twins’ zygosity (twin type). However, it is very important for twins and their families to know if twins are identical or fraternal. Among the many reasons ...

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