If the number of days of the menstrual cycle $(M.C.)$ is $35$ days in a female, then what will be the ovulation day in that female (in $days$)?

When is the menstrual cycle not observed?

Name the hormone that has no role in the menstrual cycle.

Arrange the events of the menstrual cycle in the order they occur:
$I.$ Secretion of $FSH$
$II.$ Growth of corpus luteum
$III.$ Growth of follicle and oogenesis
$IV.$ Ovulation
$V.$ Sudden increase in the level of $LH$

The diagram below shows various events during the menstrual cycle. Identify the hormones $P, Q, R,$ and $S$.

$A$ woman with a typical $28 \; \text{day}$ menstrual cycle is most likely to become pregnant as a result of sexual intercourse on which days of the cycle?