precocial young

biology

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reproduction in mammals

  • polar bear and cubs
    In mammal: Implantation, gestation, and birth

    …move about at once (precocial), or they may be blind, hairless, and essentially helpless (altricial). In general, precocial young are born after a relatively long gestation period and in a small litter. Hares and many large grazing mammals bear precocial offspring. Rabbits, carnivores, and most rodents bear altricial young.

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