What Are The Chances Of Having Twins?

The biography Identical Strangers by Elyse Schein and Paula Bernstein is about twins that got separated at birth, and now are finding out there is another person in the world with their exact DNA. They were part of a study on separated twins. It was to see in nature versus nurture which one has more of an impact. (31-32) Identical twins were easiest to study because of their identical DNA. Scientists working on the study placed both girls in a family in which are very similar; therefore, they both have a brother that is a couple years older than them. They find out about the other twin, and Paula is having their

Twins, share a bond that no parent, child or sibling relationship can ever compare. There are two main types of twins, and these include: monozygotic (identical) twins and dizygotic (fraternal) twins, and they are compared by their emotional, behavioural, and cognitive similarities. (Robert Plomin, 1997). According to Social Issues Referencing, 2007, whereas Identical twins are formed from a single (mono) zygote and are genetic “carbon copies”, fraternal twins develop from two (di) separate zygotes, as a result of two eggs being fertilized by two sperms independently. (Social Issues Referencing, 2007, para. 8)

Monozygotic twins: Monozygotic twins are also known as identical twins. These twins start their life as one egg which is fertilized by one sperm and latter splits into two eggs much earlier in the gestational period. These are very rare and have no link to heredity. But studies reveal that only one of four conceptions of twins is identical. Therefore, it seems likely that any differences between twins will have to be caused by environment rather than by genetics.

Parallel to this, the focus on genetics is Particularly convicted in twin studies, which establish a comparison between monozygotic twins that are identical and dizygotic twins, which are opposingly non-identical. This distinction can be identified in Torgersens study, which compared MZ and same sex DZ twins where one proband had an anxiety disorder, and it was discovered that such disorders were 5x more frequent in MZ twin pairs, who mutually shared identical genetics.

Conjoined twins are a rare phenomenon. In the even that a set should appear where one twin is dependant upon the other, I believe that they should be separated, at minimum, to save the life of one. At the same time, I believe that every set of conjoined twins is its own special case. In this study, I will present the background information on conjoined twinning, give a few case studies, and give the pros and cons of conjoined twin separation. I will end with my own views on the subject.

I study was preformed by Janicak et al 2001; they found that monozygotic twins have a 48% concordance rate. This is considerably less in dizygotic twins where the concordance rate falls to 17%. This would suggest there is a strong case for genetics being involved with

Throughout history, across all cultures, people have been fascinated with twins. In addition to interest in the close emotional ties and biological similarities that twins may share, reports of special twin languages and twin extrasensory perception (ESP) help people to explore ideas of what it means to be human. How similar or different are they to each other? How important are genes and environment for development? Because identical twins share all of their genes, it is the environment—rather than genetics—that accounts for any differences between them.

Have any of you ever heard of conjoined twins? It an occurrence that results in twins being connected by their body parts. It may be rare but has happened to many women in the world, and can happen to any woman around the world. Today, I am going to be informing you about conjoined twins and explaining to you some things you might not know about them. I chose this topic because it seemed very interesting to me, and I wanted to learn more about it. I’ve done research and selected multiple sources to prepare for this speech.

In a study of 44 sets of twins, there was a high concordance rate of autism and other disorders on the ASD spectrum for monozygotic twins (92%)5. This suggests that the genetic similarity between MZ twins influences their risk of expressing Autism. Dizygotic twins however, had a much lower concordance5, supporting the hypothesis that there is a correlation between genetic similarity and Autism risk. According to the study, complications during pregnancy are not likely to be the cause of autism, but simply happen more often in twin pregnancies5. The association of severe brain damage in pregnancy and Autism has not been found in singletons5. In 29 cases of twins discordant for Autism, biological hazards associated with brain damage usually affected the autistic twin. This

"Though conjoined twins are common in humans, wild birds, reptiles, amphibians, fish, and domestic and laboratory animals, the fetal abnormality is extremely

• Multiple births: Generally, in women who use IVF to establish a live birth, about 63% are single babies, 32% are twins, and 5% are triplets or more.

There are a dozen and more types of conjoined twins. These types include: Thoracopagus, omphalopagus,

There are two types of twins. One type of twins, called identical twins, is exact clones of each other. They share the same DNA and were made from a single split egg. More research as been done regarding these types of twins as they are the more remarkable kind. Since they are a genetic match, nature plays the

It is assumed by most that we will all be able to grow up, fall in love, get married, and then have children of our own. This is not the lifestyle that all people choose, but it is still the view accepted by the majority of society. What happens when the unthinkable occurs and a happily married couple is unable to get pregnant? This is a reality for 7.1%, or 2.8 million, of the married couples in the United States (Lenox, 1999). Today, there are many people all over the world that decide to use fertility treatments to help them conceive a child, and this often leads to the birth of twins, triplets, or even higher order multiples. There are many risk factors that are involved in this type of

There are many stories of identical twins who were adopted at birth who meet up late in life and discover they share remarkably similar life stories. A study in 1990 found that genetics account for 50 percent of how religious a twin was likely to be. There is also a genetic influence on dental or gum health. Among identical twins, most reported feeling closer and more familiar with their twin than they did to their best friends, even after just meeting them after spending so many years apart.