Question

The rupture of Graafian follicle to release its contents is an important event that takes place in a menstruating female. With respect to the events of the uterine cycle, it is supposed to occur

• A. at the mid secretory phase
• B. just before the end of the secretory phase
• C. at the beginning of the proliferative phase
• D. at the end of the proliferative phase

Answer 1

The correct option is D at the end of the proliferative phase

The rupture of the Graafian follicle leads to the release of the secondary oocyte. This is called ovulation. Ovulation is considered to be an important event in a menstruating female. With respect to the events in the ovarian cycle, it occurs at the end of the follicular phase. Follicular phase of the ovarian cycle coincides with the proliferative phase of the uterine cycle. So, ovulation is most likely to occur at the end of the proliferative phase.
In the secretory phase of the uterine cycle, the progesterone released by the corpus luteum in the luteal phase of the ovarian cycle, causes the uterine glands to secrete large amounts of watery mucus. It also causes the further development of uterine glands and uterine blood vessels. This phase occurs after ovulation.
At the beginning of the proliferative phase, the ovarian follicles are still developing. The Graafian follicle hasn’t developed yet, so no chance of ovulation.