Arrange the events of menstrual cycle as they occur
$I.$ Secretion of $FSH$
$II.$ Growth of corpus luteum
$III.$ Growth of follicle and oogenesis
$IV.$Ovulation
$V.$ Sudden increase in level of $LH$
$I, III, V, IV, II$
$II, I, III, IV, V$
$III, I, IV, V, II$
$I, IV, III, V, II$
During menstruation the level of progesterone in blood is
In the $28$ day human ovarian cycle, the ovulation takes place typically on
When pregnancy does not occur, the life of corpus luteum is about
Corpus luteum is the source of secretion of
Mention the importance of $LH$ surge during menstrual cycle.