28 de maig 2013, 7:29 publicada per Ignasi Pena Moré
The Siamese are those twins that their body still together after their birth. This tends to happen in one of 200.000 births. In 50% of the cases, the Siamese twins die, being the 75% of the Siamese of female gender. The percentage of survival of the twins oscillates between 5% and 25%.

There is still no scientific explication for this fact. In the past, it was said that in the multiple births or bodies with duplicated parts were produced of an excess of sperm during the fertilization.

In the present, people think that the drugs used for fertility produce this type of phenomenon, it hasn’t been proved although there is a connection between these drugs and the multiple births.

By Carla Molina and Carla Cepeda