Monozygotic 24-year-old twins presented with discordant ovarian function. One had had premature ovarian failure at the age of 14 years, whereas her sister had normal ovaries and three naturally con ...

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

Twin studies rest on two fundamental assumptions: 1) Monozygotic twins are genetically identical, and 2) the world treats monozygotic and dizygotic twins equivalently (the so-called “equal ...

Women with extensive dense breast tissue visible on a mammogram have a risk of breast cancer that is 1.8 to 6.0 times that of women of the same age with little or no density. Menopausal status, wei ...

The country's latest set of rare identical triplets headed home Monday after a month in neonatal intensive care at Houston's Memorial Hermann Southeast Hospital. Addison, Kinsley and Savannah ...

Because monozygotic twins were thought to be genetically identical, they were perfect for sorting out which traits and illnesses have a genetic basis and which are environmentally influenced.

Just like snowflakes, no two people are alike, even if they're identical twins according to new genetic research. Scientists have been working to determine the genetic sequencing of schizophrenia ...

The epigenetic heritability may help explain currently unclear issues in human disease, such as the presence of a disease in only one monozygotic twin, the different susceptibility of males (e.g ...