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 of the children survived to childhood or were born dead.
Through the advances in technology, the survival rate of infants born in a......
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