A study published in Nature found that identical twins — twins that come from a single fertilized egg — aren't genetically identical. Instead, they differ by an average of 5.2 genetic mutations that ...

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, 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 ...

A pair of twins from Rutland and a surgeon from Milford were the first to succeed with organ transplantation as doctor, donor ...

As the father of twin sons, I have spent many of the past 31 years pondering the question, “nature or nurture” to consider what has most influenced their lives. From my first days with Matthew and ...

Two sisters have left people baffled after saying their two sons are brothers, cousins and twins. Brittany and Briana are identical twins who married identical twins Josh and Jeremy Salyers and then ...

Identical twin sisters had sons on the same day just hours apart and say their “biological clocks are ticking in time”. Laura ...

Multiple births are becoming more common than they were in the past. Many women are waiting longer before having children than they did in previous generations. Fertility treatments and modern ...

If you're having twins, you might notice stronger pregnancy symptoms like extreme morning sickness, intense fatigue, extra breast tenderness, and quicker weight gain – but these signs alone aren't a ...