Multiple Births

Multiple Births - time when an egg is split it will produce...

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Multiple Births An identical quad is an egg that has split into two eggs, and then the two eggs split into a total of four eggs. The rate for identical quad births is 1 – 64,000,000. A mother can also have triplets or even twins, and they don’t have to necessarily be identical twins either. The rate for twins is 1 – 250 births are identical twins. Some women can have more than one egg coming down the fallopian tube at the same time, and they may get fertilized at the same time, or even days apart from one another. These are called fraternal twins, and they may even become pregnant by two different males as well as on different days. The likelihood for a woman to have multiple births is increased when she becomes pregnant at the beginning or the end or her reproductive years. An egg will either split within the first 14 days to produce a twin or it never will. Most of the
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Unformatted text preview: time when an egg is split it will produce the same sex, but not always. On rare occasions the XX and XY chromosomes will make a male and a female. In any of these multiple births the babies the babies can either share the same sack, or have their own sacks, as well as the can share the same umbilical chords, or they may have their own umbilical chords. In the case of the odds for having multiple births race does take a role. For Asians the odds are 1 400, in Whites the odds are 1 88 and for Indians the odds are 1 25. Older women and the rate of sex can also play a role in this as well. The first organ to form is the heart. Embryos have gills and a tail for the first month. 1 400 fraternal twins are from different fathers....
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This note was uploaded on 12/20/2010 for the course SOC 101 taught by Professor Sullivan during the Spring '08 term at ASU.

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