Question

Which of the following is a feature of the secretory phase of menstrual cycle?
A. Fall in leaves of oestrogen and progesterone
B. Start of menstrual phase
C. Bleeding phase
D. Luteal phase

Answer 1

This phase occurs from day 14 to day 28 of the cycle and it prepares the corpus luteum and endometrium for the implantation of fertilised ovum. The secretary phase of menstrual cycle is also known as luteal phase and these refer to the secretion of the progesterone (female sex hormone)from the corpus luteal and also it refers to the secretion of a clear fluid by the endometrium during this luteal phase. This phase occurs from day 14 to day 28 of the cycle.

Complete answer:
The hormone progesterone which is stimulated by LH is the dominant hormone in this phase because it prepares the corpus luteum and endometrium for the implantation of fertilised ovum. When this phase ends then the progesterone gives a negative feedback to the anterior lobe of the pituitary gland in order to decrease the FSH and LH hormone levels.
If we look at options now, option A is Fall in leaves of oestrogen and progesterone. It is an incorrect one as in the secretory phase there is not such activity seen which makes it the incorrect option and it gets eliminated.
Moving to option B which is Start of the menstrual phase. But it is not the starting phase of the menstrual cycle since this phase occurs from day 14 to day 28 of the cycle. The starting phase is the follicular phase. Therefore, it is incorrect and this option gets eliminated.
Moving to option C which is the Bleeding phase. It is the incorrect option since the secretory phase is not the bleeding phase but it is the luteal phase of the menstrual cycle.
Last option D is Luteal phase and it is the correct option since the secretary phase of menstrual cycle is also known as luteal phase and these refer to the secretion of the progesterone (female sex hormone) from the corpus luteal and also it refers to the secretion of a clear fluid by the endometrium during this luteal phase.

Thus, the correct option is D which is luteal phase.

Note: Luteal phase is also known as secretary phase and this phase occurs from day 14 to day 28 of the cycle. The hormone progesterone which is stimulated by LH is the dominant hormone in this phase because it prepares the corpus luteum and endometrium for the implantation of fertilised ovum.