Fraternal twins can look alike as much as two siblings ... This is called superfecundation. Mixed-gender twins are the most common type of fraternals, some 50 percent are boy-girl.

Nationwide, twins occur in just around 3% of all births, according to national data. But the class of 2025 at one high school ...

The fraternal twins were born shortly after the stroke of midnight at Cleveland Clinic Hillcrest Hospital, with José Ervin III arriving at 12:35 a.m., just one minute before sister Ar’ria ...

There are two types of twins, identical and fraternal twins. Identical twins develop from one egg; the egg is fertilized by the sperm then divides into two. Identical twins are similar in ...

This is called superfecundation. The Science of Fraternal Twins Mixed-gender twins are the most common type of fraternals, some 50 percent are boy-girl. To understand this combination: Males have ...