The male hormones then masculinize the female twin, and the result is a freemartin.

The Millers are the first identical female twins to attend the academy.

Academy officials said that although other female twins have attended or are attending West Point, none of them were identical.

The female twins, born on June 9, weigh about three pounds each.

Elli, sitting on Miles's other side, seemed Ivan's female twin.

Beatrice and Suzy are considered to be the tallest female twins in the world.

Kinney proposes the creation of a female genetic twin; her request is denied.

Among female identical twins, when one sister had Alzheimer's disease, the other developed the disease 60% of the time.