The gestation period in humans is nine months. [Please select]
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Whether a pouch is present or not, the young are born in an exceedingly imperfect state of development, after a very short period of gestation, and are immediately transferred by the female parent to the teats, where they remain firmly attached for a considerable time; the milk being injected into their mouths at intervals by means of a special muscle which compresses the glands. [Please select]
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This is the gestation of the nineteenth century. [Please select]
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TESSIER, on the period of gestation of the dog. [Please select]
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The number of mammæ vary, as does the period of gestation. [Please select]
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Hunter found that the gestation of a mongrel from wolf and dog ('Phil.') [Please select]
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Cuvier found the period of gestation of the wolf to be ('Dict.') [Please select]
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The time of gestation is to sixty-three days, and the number of the kittens varies much. [Please select]
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The number of mammae vary, as does the period of gestation. [Please select]
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"[44] It has been objected that our domestic dogs cannot be descended from wolves or jackals, because their periods of gestation are different." [Please select]
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Tessier, who {30} has closely attended to this subject, allows a difference of four days in the gestation of the dog. [Please select]
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