Question

Below is given the unorganised list of some important events in the human female reproductive cycle. Identify the correct sequence of these event and select the correct option.
(i) Secretion of FSH
(ii) Growth of corpus luteum
(iii) Growth of the follicle and oogenesis
(iv) Ovulation
(v) Sudden increase in levels of LH

• A. (i) $\to$ (iv) $\to$ (iii) $\to$ (v) $\to$ (ii)
• B. (ii) $\to$ (i) $\to$ (iii) $\to$ (iv) $\to$ (iv)
• C. (iii) $\to$ (i) $\to$ (iv) $\to$ (ii) $\to$ (v)
• D. (i) $\to$ (iii) $\to$ (v) $\to$ (iv) $\to$ (ii)

Answer 1

The correct option is D (i) $\to$ (iii) $\to$ (v) $\to$ (iv) $\to$ (ii)

During the follicular phase, the secretion of FSH happens and this leads to the development of a mature follicle (Graafian follicle). This process of formation of a mature female gamete is called oogenesis. The FSH level increase causes the development of follicles and secretion of estrogen by the growing follicles. Rapid secretion of LH leads to the rupture of Graafian follicle and release of ovum called ovulation. This phase is followed by the remaining parts of Graafian follicle transform into the corpus luteum.

So, the correct option is '(i)

→→ (iii) →→ (v) →→ (iv) →→ (ii)'.