Plenty of devoted, detail-obsessed parents mix up their own twins sometimes. It's hard to avoid when there are two cute babies in matching onesies rolling around on the same play mat. But here's the ...

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 ...

Twin sisters Verla Starkey, left, and Merla Swenson look at a book of their family history at their home in Kaysville on Wednesday. | Laura Seitz, Deseret News Verla Starkey and Merla Swenson like to ...

Identical, or monozygotic, twins develop from the same fertilized egg that splits into two. These twins are the same sex and share the same genes. Sometimes called paternal twins, identical twins ...

Sarah and Aimee Charlwood are identical twins who didn't spend a day apart until they were 16.Courtesy of Sarah Charlwood Sarah and Aimee Charlwood from Brisbane, Australia, are identical twins. They ...

Gabrielle Taylor tells PEOPLE that the early fear, physical toll and chaotic newborn phase of having identical twins ...

For more than a century, scientists have debated whether intelligence is mostly a product of nature or nurture. Identical twins—those born with the same genetic blueprint—have long been the perfect ...

When she was pregnant with her twins, she says there was one specific way the doctors managed to tell the twins apart After the babies were born, Taylor admits there was more that could've been done ...

Identical twins Sanumi and Sanuthi Ranasinghe have achieved a rare milestone, graduating as medical doctors from the ...