Twin Research and Personality

Twin research and personality

The word twin is not new in our lives. There are two types of twins that are known today. Identical twins and fraternal twins are the common names given to the two fertilized eggs in the uterus of a woman. Fraternal twins do not look similar to each other; in contrast, identical twins have similar appearance and sharing the same genes (Stephen F.& Joseph J. Palladino(2010).

During sexual intercourse between the male and female partners, the sperm is releases and combined with Ova from the woman, forming the zygote. In addition, growth of the individual child normally proceeds after the fertilized egg has become implanted within the wall of the uterus. In rare circumstances two unfertilized eggs at one time are released in the ovaries; each egg may be a fertilized genetics of humans.

Although, many people and scientists predict the birth of twins as a result of one egg splitting into two, the exact reason for twin birth is not known. Most of the doctors and researchers have identified several reasons for such a probability. Azalete Bolger Well (2006) noted that “it is more common for a woman to have a twin birth when one has already occurred in her family. This is true. People in my culture, used to believe that the birth of twins skips generations and it is something inherited from one person to another. According to the researchers, women, who are taller and heavier are more likely to have twins. Similarly, if a woman has already had fraternal or identical twins, the chances of her having another set are more than a woman who has never had twins.

Some of the reasons based on scientific research are different from traditional believes. For instance, scientists believed that the rise in twin births is the use of fertility medicines. According to Bergeman, Plomin, McClean, Pederson and Friberg, (1998), one-third of the increase in multiple conceptions is due to the fact