Arrange the following hormones involved in correct sequence during menstrual cycle?
(A) Estrogen
(B) Progesterone
(C) FSH
(D) LH
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (C), (A), (D), (B)
(C) FSH — first. In the follicular phase, the pituitary’s FSH (with LH) rises gradually and makes the follicles grow.
(A) Estrogen — second. The growing follicles secrete estrogen, which rebuilds the endometrium.
(D) LH — third. In the middle of the cycle, the LH surge ruptures the Graafian follicle and causes ovulation.
(B) Progesterone — last. In the luteal phase, the corpus luteum secretes progesterone, which keeps the endometrium ready for implantation.
NCERT Extract:
Menstrual Cycle – “… The menstrual phase is followed by the follicular phase. During this phase, the primary follicles in the ovary grow to become a fully mature Graafian follicle and simultaneously the endometrium of uterus regenerates through proliferation. These changes in the ovary and the uterus are induced by changes in the levels of pituitary and ovarian hormones (Figure 2.9). The secretion of gonadotropins (LH and FSH) increases gradually during the follicular phase, and stimulates follicular development as well as secretion of estrogens by the growing follicles. Both LH and FSH attain a peak level in the middle of cycle (about 14th day). Rapid secretion of LH leading to its maximum level during the mid-cycle called LH surge induces rupture of Graafian follicle and thereby the release of ovum (ovulation).”
