Arrange the phases of the menstrual cycle according to their occurrence.
(A) Follicular Phase
(B) Menstruation
(C) Luteal Phase
(D) Ovulation
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (B), (A), (D), (C)
(B) Menstruation — first. The cycle starts with the menstrual phase, which lasts for 3-5 days. The endometrial lining of the uterus and its blood vessels break down and flow out.
(A) Follicular Phase — second. The primary follicles in the ovary grow into a mature Graafian follicle. At the same time the endometrium regenerates by proliferation, under the rising LH, FSH and estrogens.
(D) Ovulation — third. In the middle of the cycle (about the 14th day), the LH surge ruptures the Graafian follicle and the ovum is released.
(C) Luteal Phase — last. The remaining parts of the Graafian follicle form the corpus luteum, which secretes large amounts of progesterone to maintain the endometrium. If there is no fertilisation, the corpus luteum degenerates and the next menstruation begins.