In girl, the first menstruation begins at puberty and is called .....

  • A

    Menarche

  • B

    Menstrual cycle

  • C

    Menopause

  • D

    None

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Why are menstrual cycles absent during pregnancy ?

In the human female, menstruation can be deferred by the administration of

  • [AIPMT 2007]

Match the columns.

Column 1 Column II
$(a)$ $6-14$ days $(1)$ It is known as menstrual cycle
$(b)$ $1-5$ days $(2)$ Polar body is down
$(c)$ $15-28$ days $(3)$ It is known as proliferative phase
 

$(4)$ Endometrium is prepared forimplantation of embryo

 

The structure formed after release of ova from graafian follicles and secretory in nature, is

  • [AIPMT 1999]