Question

Which of the following hormone levels will cause the release of an ovum (Ovulation) from the Graafian follicle?

• A. Low concentration of LH
• B. Low concentration of FSH
• C. High concentration of Estrogen
• D. High concentration of Progesterone

Answer 1

The correct option is C

High concentration of Estrogen

The correct option is C.

Explanation of correct option:

1. Estrogen is a steroid hormone.
2. It helps in developing and maintaining both reproductive system and female characteristics like breast and pubic hair.
3. The mature follicle containing the ovum promotes the release of estrogen in higher levels.
4. The gonadotrophin-releasing hormone will also be secreted which makes the pituitary gland secrete more LH (luteinizing hormone) and FSH (Follicle-stimulating hormone).
5. The higher levels of LH and FSH will trigger ovulation within two days.

Explanation of incorrect options:

Option A:

1. Low concentration of LH will cause irregular periods.
2. The ovulation does not occur if LH levels are low.

Option B:

1. FSH is a hormone secreted by the pituitary gland which stimulates the growth of ovarian follicles.
2. If FSH levels are low ovarian follicles will not grow properly and ovulation will not occur.

Option D:

1. Progesterone is the hormone released by the ovaries.
2. It helps in the implantation of a fertilized egg in the uterus.
3. Progesterone levels will increase only after ovulation.

Final answer: Higher levels of estrogen will cause the release of ovum from the Graaffian follicle.