We present a case of monozygotic twins who are discordant for breast cancer and chemotherapy exposure (ie, one twin contracted breast cancer and underwent chemotherapy, and the other had no breast ...

This is the largest genome-wide association study (GWAS) of identical twins to date. They identified several genetic factors that were linked with differences in environmental sensitivity within ...

Rare case of "fetus in fetu" discovered in India, a condition where one twin develops inside the other.

A new study reveals that typically developing twins consistently take on the dominant role over their nontypically developing siblings, even after developmental gaps are resolved. By highlighting how ...

The two most common types of twins are dizygotic (fraternal) and monozygotic (identical). Learn more about them and what may possibly cause multiple births.

This study investigates how monozygotic (MZ) and dizygotic (DZ) twins process emotional experiences, concentrating on the influence of genetic and environmental factors. Monozygotic twins, who share ...