Menstruation cycle occurs

  • A

    In all mammals

  • B

    In eutherian animals

  • C

    In metatherian animals

  • D

    In all primates

Similar Questions

Ripe ova are shed by ovaries into

What is menstrual cycle? Which hormones regulate menstrual cycle?

No new follicles develop in the luteal phase of the menstrual cycle because

  • [NEET 2019]

Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces giving the name of the hormones responsible for the events shown.

$\boxed{\rm {Primary follicles}}$

$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \leftarrow \,\boxed A$

$\boxed{\rm {Graafian follicle}}$

$\,\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \leftarrow \,\boxed B$

$\,\,\,\,\,\,\,\,\,\,\,\boxed{\rm {Ovum}}$

$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \downarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \leftarrow \,\boxed C$

$\boxed{\rm {Corpus leuteum}}$

Assertion : Corpus luteum degenerates in the absence of fertilization.

Reason : Progesterone level decreases.

  • [AIIMS 2009]