In girl, the first menstruation begins at puberty and is called .....
Menarche
Menstrual cycle
Menopause
None
Corpus luteum is developed from
Why are menstrual cycles absent during pregnancy ?
In the human female, menstruation can be deferred by the administration of
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