Moderate

From day 6-28 of a menstrual cycle, which wall of the uterus is repaired?

Correct answer: D. Endometrium

  • A. All the three walls
  • B. Perimetrium
  • C. Myometirum
  • D. Endometrium

Explanation

From day 6-28 of the menstrual cycle, the repair and thickening of the endometrial lining occur. This phase is part of the menstrual cycle and involves the proliferative and secretory phases. After menstruation (shedding of the previous cycle's endometrial lining), the proliferative phase begins. Rising levels of estrogen, produced by developing ovarian follicles, stimulate the growth and proliferation of the endometrial lining. Midway through the menstrual cycle, ovulation occurs, marked by the release of a mature egg from the ovary. After ovulation, the ruptured follicle transforms into a structure called the corpus luteum. The corpus luteum produces progesterone, which further supports the development and vascularization of the endometrial lining. The secretory phase prepares the endometrium for the possible implantation of a fertilized egg. If fertilization does not occur, the corpus luteum degenerates, leading to a decline in progesterone levels. This hormonal change triggers the shedding of the endometrial lining, and menstruation begins again, marking the start of a new menstrual cycle.

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About Reproduction

Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.

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