A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
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Boys who have unusual first names are more likely to have mental problems than boys with conventional names. Girls don't seem to have this problem.
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Women have a slightly higher average IQ than men.
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There are about 255 babies born worldwide every minute.
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The typical person spends about 600 hours having sex between the ages of 20 and 70.
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The offspring of two sets of identical twins are legally cousins but genetically siblings.
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