Question

Which of the following statements is correct regarding menstrual cycle?

• A. LH induces rupturing of Graafian follicle
• B. Proliferative phase is characterized by the increased production of progesterone
• C. Corpus luteum secretes large amount of estrogen
• D. Both LH and FSH attain a peak level in secretory phase

Answer 1

The correct option is A LH induces rupturing of Graafian follicle

The four phases of the menstrual cycle are menstruation, the follicular phase (proliferative phase), ovulation and the luteal phase (secretory phase).

During the proliferative phase in the uterus, the hormone estrogen is released from the maturing Graafian follicles in the ovaries.
Estrogen stimulates the proliferation of cells in the endometrium of the uterus. This peak in estrogen triggers a brief surge in luteinizing hormone (LH ) which triggers ovulation. During ovulation the graafian follicle is ruptured and the ovum is released.
The ovulation (ovulatory phase) is followed by the luteal (secretory) phase during which the remaining parts of the Graafian follicle transform as the corpus luteum which secretes large amounts of progesterone.