Multiple Births :: essays research papers

eightfold BirthsMultiple haves are rare in humans with agree as being the most familiar formof this event. Multiple returns usher out modernize in many different combinations of ways tho the probability of talent family to more than ace child clay fairly eonian when compared to the entire human ladder. The chances of multiple birthscan too vary from race and genetic background. Scientist and researchers donot know what the exact cause of these variations is but many of them feel thatit is caused by horm nonpareil differences between different racial groups and/or thedifference in social class.The prenatal and infant death browse is frequently higher in multiple pregnanciesthan in pregnancies that only involves one child. The danger of premature birthalso increased with the higher total of offspring that are involved. In manymultiple births, not in all of the children survived to childhood or were born dead.Through the advances in technology, the survival rate of infa nts born in amultiple pregnancy has increased. The first quintuplets, volt babies born in asingle pregnancy, to survive in aesculapian history were the Dionne quintuplets.The use of drugs that treat female sterility, or fertility drugs, mayincrease the chances of giving birth to multiple children. These drugs causethe ovaries to fall by the wayside an addict once a month but in some character references they release morethan one egg, some condemnations releasing several at a time, increasing the chances of amultiple birth. The drug clomiphene citrate is one of the most widely takenfertility drug and has resulted in the birth of twins about once in every twelvebirths, much greater than the chances of the birth of natural twins.Twins are the most common form of a multiple pregnancy. About one in 87 births result in the birth of twins. Twins can be fraternal, alsoknown as dizygotic twins, or identical, also called monozygotic twins, with thebirth of identical twins being the rare st, occurring about four times in everythousand births, about one-forth as often as the birth of fraternal twins. Thisratio of the birth of twins to the total number of births remains fairlyconstant but the birth of fraternal twins can alter greatly. Fraternal twinsare most common among foreboding(a) African followed by people of European origin.Asian races originating from the orient are the least likely to give birth tofraternal twins.The birth of twins can occur in two different ways, the fertilization ofa single egg or the fertilization of two eggs. In the case of dizygotic twins,the womans ovaries release two eggs about the same time instead of one, with