explain the difference between ovulation and menstruation
â¢ Ovulation is the release of a mature ovum from an ovary, whereas menstruation is the discharge of blood, broken uterine lining, and dead ovum from the body. â¢ Ovulation takes place 14 days before menstruation in the reproductive cycle, whereas menstruation marks the beginning and end of menstruation cycle.he length of the menstruation cycle is measured from day 1 of one cycle to day 1 of the next cycle. The duration of normal menstruation cycle is around 21 days to 36 days. Ovulation. The release of an ovum from an ovary is known as ovulation. It occurs only once in every menstruation cycle.