The extra head was complete with eyes, ears, nose and lips and a malformed left hand hanging down her chest.
When Carmen and Lupita were born, they were sharing ribs, circulatory, digestive and reproductive systems. Doctors said they would only survive for about three days.
Ultrasound scanning or sonography is a noninvasive, interactive tool used to provide real-time visualization of fetus.
LaTroya Woolridge was only 24 months pregnant when she went into active labor.
Initial findings from NASA's twin study have been revealed. Twins and astronaut Scott Kelly and Mark Kelly participated in making the experiment possible.
A Glandale woman gave brith to twins in different years. How is it possible?
An Australian woman receiving hormone treatment for polycystic ovary syndrome, a condition that prevents women from ovulating, got pregnant twice in 10 days.
Only humans and armadillos were previously thought to give birth to identical twins. Now, the world's first twin pup has been born and it's total cuteness overload!
Extremely rare tortoise twins born at the Garden State Tortoise organization in New Jersey beat incredible odds to make it into the world but not without some help from the organization's founder.
As part of an unprecedented study of zero gravity and weightlessness, identical twin astronauts have volunteered to take part in a yearlong NASA space project.