Mothers of twins do not just get twice the bundle ofjoythey are also healthier than other mothers
拥有双胞胎的母亲不仅能得到双份的快乐,而且她们会比其她母亲更健康。
THROUGHOUT history, twins have provoked mixed feelings. Sometimes they were seen as acursean unwanted burden on a familys resources. Sometimes they were viewed as ablessing, or even as a sign of their fathers superior virility. But if Shannen Robson and KenSmith, of the University of Utah, are right, twins have more to do with their mothers sturdyconstitution than their fathers sexual power.
在历史上,对待双胞胎有着复杂的感情。有时,他们被视为祸根--家庭中不受欢迎的负担。有时,他们被视为祝福,或作为他们父亲拥有更好的性能力的一个标志。但如果犹他大学的夏侬.罗布森和肯.史密斯是正确的,那么双胞胎为他们的母亲那健壮的体格所做的比为他们的父亲的性能力方面所做的更多。
At first blush, this sounds an odd idea. After all, bearing and raising twins is taxing, both forthe mother and for the children. Any gains from having more than one offspring at a timemight be expected to be like higher infant and maternal mortality rates. On this view, twins areprobably an accidental by-product of a natural insurance policy against the risk of losing anembryo early in gestation. That would explain why many more twins are conceived than born,and why those born are so rare . Theyaccount for between six and 40 live births per 1,000, depending on where the mother lives.
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