question_answer

Following is diagrammatic representation of menstrual cycle depicting certain events. The uterine events have been labelled as phases A, B, C and D. The ovarian hormones have been labelled as W, X and pituitary hormones as Y and Z. Answer the questions that follow

(i) Lack of which phase is indicative of pregnancy?

(ii) During which phase implantation of blastocyst takes place?

(iii) Identify the hormones W, X, Y & Z.

(iv) A preovulatory surge of which hormone is necessary to cause ovulation?

A)

(i) Phase A (ii) Phase B (iii) W - Estrogen X - Progesterone Y-FSH Z - LH Z

B)

(i) Phase A (ii) Phase D (iii) W - Estrogen X - Progesterone Y - FSH Z-LH (iv) Z

C)

(i) Phase D (ii) Phase C (iii) W - Estrogen X - Progesterone Y-LH Z-FSH (iv) Y

D)

(i) Phase D (ii) Phase B (iii) W - Progesterone X - Estrogen Y-FSH Z-LH (iv) Y