| Direction: Read the following and answer the questions from given below |
| The average length of the menstrual cycle is 28-29 days, but this can vary between woman and from one cycle to the next. The menstrual cycle is controlled by many different glands and the hormones that these glands produce. The menstrual cycle is a biofeedback system, which means each structure and gland is affected by the activity of the others menstruation is the elimination of the thickened lining of the uterus from the body through vagina, menstrual fluid contains blood, cells from the lining of the uterus and mucus. |
| The average length of a period is between three days and one week. The four phases of the menstrual cycle include menstruation, the follicular phase, ovulation and the luteal phase. |
| (v) The events of the menstrual cycle are represented below. In which of the following option, the level of FSH, LH and progesterone is mentioned correctly. |
 |
A)
13th -14th days 21st to 23rd days FSH LH Progesterone FSH LH Progesterone High High Low Low Low High
B)
13th -14th days 21st to 23rd days FSH LH Progesterone FSH LH Progesterone High High High Low Low Low
C)
13th -14th days 21st to 23rd days FSH LH Progesterone FSH LH Progesterone Low Low Low High High High
D)
13th -14th days 21st to 23rd days FSH LH Progesterone FSH LH Progesterone Low Low High High Low Low
Correct Answer: A
Solution :
[a] Option [a] correctly mention the level of different hormones at given periods. During the 13th- 14th days, Graafian follicle reaches the vertex of maturity and ovulation occurs. Thus, FSH and LH are at high level, whereas progesterone level is low. During 21st-23rd days, i.e. the middle of luteal phase, progesterone level is high, whereas the level of gonadotropins, LH and FSH is low so as to suppress the growth of new follicles.
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