Lack of menstruation is caused due to
Stress
Poor health
Pregnancy
All correct
The secretory phase in the human menstrual cycle is also called
Assertion : Corpus luteum degenerates in the absence of fertilization.
Reason : Progesterone level decreases.
The menstrual cycle in normal adult woman is of
Ripe ova are shed by ovaries into
Which one of the following events is correctly matched with the time period in a normal menstrul cycle