Secondary peak level of estrogen in menstruation cycle occurs due to

Options

A. Formation of graafian follicle
B. Ovulation
C. Formation of primary follicie
D. Formation of corpus luteum

Answer

**Step-by-Step Solution:**

1. **Understanding the Menstrual Cycle Phases**: The menstrual cycle is divided into several phases, primarily the follicular phase and the luteal phase. Each phase is characterized by different hormonal changes.

2. **Identifying the First Peak of Estrogen**: During the follicular phase (days 6 to 13 of the cycle), the follicles in the ovaries mature. The granulosa cells of these follicles secrete estrogen, leading to the first peak of estrogen levels.

3. **Ovulation**: Following the follicular phase, ovulation occurs. This is when a mature egg is released from the dominant follicle.

4. **Formation of Corpus Luteum**: After ovulation, the remaining follicle transforms into the corpus luteum. This structure is crucial for hormone production.

5. **Estrogen Secretion by Corpus Luteum**: The corpus luteum primarily secretes progesterone, but it also produces estrogen. This leads to a secondary peak in estrogen levels during the luteal phase (days 15 to 28 of the cycle).

6. **Conclusion**: The secondary peak level of estrogen in the menstrual cycle occurs due to the formation of the corpus luteum after ovulation, which secretes both progesterone and estrogen.

**Final Answer**: The secondary peak level of estrogen in the menstruation cycle occurs due to the formation of the corpus luteum.

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