Complications during pregnancy[ edit ] Main article: Vanishing twin Researchers suspect that as many as 1 in 8 pregnancies start out as multiples, but only a single fetus is brought to full term, because the other fetus has died very early in the pregnancy and has not been detected or recorded. There are several reasons for the "vanishing" fetus, including it being embodied or absorbed by the other fetus, placenta or the mother. This is known as vanishing twin syndrome.
Complications during pregnancy Main article: Vanishing twin Researchers suspect that as many as 1 in 8 pregnancies start out as multiples, but only a single fetus is brought to full term, because the other fetus has died very early in the pregnancy and has not been detected or recorded.
There are several reasons for the "vanishing" fetus, including it being embodied or absorbed by the other fetus, placenta or the mother. This is known as vanishing twin syndrome.
Also, in an unknown proportion of cases, two zygotes may fuse soon after fertilization, resulting in a single chimeric embryo, and, later, fetus.
Chang and Eng Bunkerborn in Siam now Thailand inwere the origin of the term "Siamese twins". Conjoined twins Main article: Conjoined twins Conjoined twins or the once-commonly used term "siamese" are monozygotic twins whose bodies are joined together during pregnancy.
This occurs when the zygote starts to split after day 12  following fertilization and fails to separate completely. This condition occurs in about 1 in 50, human pregnancies. Most conjoined twins are now evaluated for surgery to attempt to separate them into separate functional bodies.
The degree of difficulty rises if a vital organ or structure is shared between twins, such as the brainheart or liver. Chimera genetics A chimera is an ordinary person or animal except that some of their parts actually came from their twin or from the mother.
A chimera may arise either from monozygotic twin fetuses where it would be impossible to detector from dizygotic fetuses, which can be identified by chromosomal comparisons from various parts of the body.
The number of cells derived from each fetus can vary from one part of the body to another, and often leads to characteristic mosaicism skin coloration in human chimeras. A chimera may be intersexcomposed of cells from a male twin and a female twin.
In one case DNA tests determined that a woman, mystifyingly, was not the mother of two of her three children; she was found to be a chimera, and the two children were conceived from eggs derived from cells of their mother's twin. Parasitic twin Sometimes one twin fetus will fail to develop completely and continue to cause problems for its surviving twin.
One fetus acts as a parasite towards the other. Sometimes the parasitic twin becomes an almost indistinguishable part of the other, and sometimes this needs to be treated medically. Partial molar twins A very rare type of parasitic twinning is one where a single viable twin is endangered when the other zygote becomes cancerous, or molar.
This means that the molar zygote's cellular division continues unchecked, resulting in a cancerous growth that overtakes the viable fetus. Typically, this results when one twin has either triploidy or complete paternal uniparental disomyresulting in little or no fetus and a cancerous, overgrown placenta, resembling a bunch of grapes.
Miscarried twin Occasionally, a woman will suffer a miscarriage early in pregnancy, yet the pregnancy will continue; one twin was miscarried but the other was able to be carried to term.
This occurrence is similar to the vanishing twin syndrome, but typically occurs later, as the twin is not reabsorbed. Low birth weight It is very common for twins to be born at a low birth weight.
More than half of twins are born weighing less than 5. Premature birth and low birth weights, especially when under 3. Twin-to-twin transfusion syndrome Main article:You think being a celebrity hound in the Twin Cities means sleeping all day and getting a bone any time you want it?
Let me tell you about it. Jun 05, · Sindi Dlathu was born on 4th January, She is s a South African actress and Musician. She was an on-screen character on Muvhango as Thandaza Moekoena where she assumed a part as a spouse to Ranthumeng Moekoena, a granny to Vusi's and Katlego's youngster, a little girl to Mankosi and a Mother to Dakalo and Author: Moses.
Biography Whenever one of the most celebrated and influential electronic fartist, Richard D. James can compete with the music flip to influence built. The better part of a decagon, James Polygon Window, Caustic Window, GAK and maintain, including `Aphex Twin has unreleased music under several thousand monikers great pace.
In Central Africa, there are 18–30 twin sets (or 36–60 twins) per 1, live births. In Latin America, South Asia, and Southeast Asia, the lowest rates are found; only 6 to 9 twin sets per 1, live births.
North America and Europe have intermediate rates of 9 to 16 twin sets per 1, live births. Oct 05, · As my life has gone on, I've realized just how lucky I am to be a twin.
I have learned and experienced a lot from having this perspective that, as I age, I attribute directly to my sister and to. The fourth proper Aphex Twin album, November 's Richard D. James Album, continued his forays into acid-jungle and experimental music.
Retaining the experimental edge, but with a stated wish to make the British pop charts, James ' next two releases, 's Come to Daddy EP and 's Windowlicker EP, were acid storms of industrial .