Question:
Select the phase of menstrual cycle in which the remaining parts of Graafian follicle transform into the corpus luteum.
Select the phase of menstrual cycle in which the remaining parts of Graafian follicle transform into the corpus luteum.
Show Hint
The corpus luteum forms from the ruptured follicle and works during the secretory (luteal) phase.
Updated On: Oct 22, 2026
- Secretory phase
- Proliferative phase
- Menstrual phase
- Ovulatory phase
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The Correct Option is A
Solution and Explanation
Step 1: Recall the cycle:
The menstrual cycle has the menstrual, proliferative (follicular), ovulatory and secretory (luteal) phases.
Step 2: Find the corpus luteum phase:
At ovulation the Graafian follicle ruptures and releases the ovum.
The remaining follicular cells then change into the corpus luteum.
The corpus luteum secretes a large amount of progesterone.
This hormone prepares the endometrium for implantation, and this is the secretory (luteal) phase.
Step 3: Check the wrong options:
Proliferative phase: follicles grow and the endometrium thickens under oestrogen, with no corpus luteum yet.
Menstrual phase: the endometrium breaks down and bleeding occurs.
Ovulatory phase: the ovum is released, but the corpus luteum forms after this event.
Final Answer:
The corpus luteum forms and works in the secretory phase, so the answer is option (A). \[ \boxed{\text{Secretory phase}} \]
The menstrual cycle has the menstrual, proliferative (follicular), ovulatory and secretory (luteal) phases.
Step 2: Find the corpus luteum phase:
At ovulation the Graafian follicle ruptures and releases the ovum.
The remaining follicular cells then change into the corpus luteum.
The corpus luteum secretes a large amount of progesterone.
This hormone prepares the endometrium for implantation, and this is the secretory (luteal) phase.
Step 3: Check the wrong options:
Proliferative phase: follicles grow and the endometrium thickens under oestrogen, with no corpus luteum yet.
Menstrual phase: the endometrium breaks down and bleeding occurs.
Ovulatory phase: the ovum is released, but the corpus luteum forms after this event.
Final Answer:
The corpus luteum forms and works in the secretory phase, so the answer is option (A). \[ \boxed{\text{Secretory phase}} \]
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