Question

The graph below shows different phases of menstruation cycle's hormones. Select the option giving correct identification together with is source of secretion and function.

• A. A $\to$ Progesterone; Graffian follicle; Proliferation of endometrium
• B. B $\to$ Estrogen; Developing follicle; Proliferation of endometrium
• C. C $\to$ LH; Corpus Luteum; Ovulation
• D. D $\to$ FSH; Hypothalamus; Spermatogenesis

Answer 1

The correct option is A A $\to$ Progesterone; Graffian follicle; Proliferation of endometrium

• In the given graph, A shows the varying levels of progesterone, which reach their peak during the luteal phase of the menstrual cycle. It is involved in the proliferation of the endometrium and in the maturation of the secondary follicle to form the Graffian follicle.
  
• B shows the varying levels of estrogen which reaches its peak on the 14th day of the menstrual cycle and cause ovulation.
  
• C shows the varying levels of the luteinizing hormone that reaches its peak on the 14th day of the menstrual cycle, called the LH surge and cause ovulation.
  
• D shows the varying levels of follicle stimulating hormone which reached its peak at about the same size as estrogen and luteinizing hormone.
  

So, the correct answer is 'A → Progesterone; Graffian follicle; Proliferation of endometrium'.