In human female which of the following is incorrect

  • A

    Menstrual cycle takes $28$ days

  • B

    Menopause occur at $45-55$ years

  • C

    The ovulated egg released during pregnancy die

  • D

    Menstruation takes $4$ days

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When the ovulation is expected in a normal menstrual cycle?

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What is called menstrual cycle ? Describe its phases ?

$A$ : Corpus luteum begins to atrophy after a short life of $10 \;to \;14$ days, if fertilisation does not occur.
$R$ : Luteolysis may be due to withdrawal of $LH$ support