Placenta is the region, where

  • A

    Foetus is supplied by maternal blood

  • B

    Embryo is attached to mother by umbilical cord

  • C

    Foetus receives maternal blood and nutrition

  • D

    Embryo is enclosed by membranes

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Hormones secreted by the placenta to maintain pregnancy are

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During pregnancy the level of which hormones are increased ?

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The hormone released from placenta is

During the development of embryo which of the following occur first