Multiple Births Multiple births are rare in humans with twins as being the most common form of this event. Multiple births can arise in many different combinations of ways but the probability of giving birth to more than one child remains fairly constant when compared to the entire human race. The chances of multiple births can also vary from race and genetic background. Scientist and researchers do not know what the exact cause of these variations is but many of them feel that it is caused by hormone differences between different racial groups and/or the difference in social class. The prenatal and infant mortality is much higher in multiple pregnancies than in pregnancies that only involves one child. The danger of premature birth also increased with the higher number of offspring that are involved. In many multiple births, not all o....

Number Of Pages: 5

Number Of Words: 1109

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