Mono-mono twins are very rare. A 13-year study of mo-mo twins estimated that they make up just 0.008% of total births. Even ...

Chelsea and Billy Hungate are the proud parents of twin baby girls. The girls have been healthy and growing since they were born in the summer, but if one of them hadn’t received surgery before ...

Twins—smaller at birth, on average, than singletons—start out smaller in pregnancy than was previously known, according to a study by researchers at the National Institutes of Health (NIH).

After all, shortly after the fateful ultrasound, I discover that the odds of us having gotten spontaneously pregnant with twins, meaning without fertility assistance or genetic influence, were ...

The couple's excitement grew when her first ultrasound showed she would have identical twin girls. "It was such an amazing surprise," Ashley said.

Kelsey Hatcher was just 17 when she learned she had a double uterus. Fifteen years later, the Alabama woman got a second shock: She's pregnant with twins, one in each uterus.