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Multiple Choice
Which of the following events occurs immediately after ovulation in the human female reproductive cycle?
A
Formation of the corpus luteum from the ruptured follicle
B
Fertilization of the released egg in the uterus
C
Degeneration of the endometrial lining
D
Initiation of menstruation
Verified step by step guidance
1
Understand the process of ovulation: Ovulation is the release of a mature egg (oocyte) from the ovary into the fallopian tube. This occurs approximately midway through the menstrual cycle, typically around day 14 in a 28-day cycle.
Learn what happens to the follicle after ovulation: The follicle that released the egg undergoes a transformation. It becomes the corpus luteum, a temporary endocrine structure that secretes hormones such as progesterone and estrogen to support the potential implantation of a fertilized egg.
Clarify the role of the corpus luteum: The corpus luteum plays a critical role in maintaining the endometrial lining of the uterus, preparing it for a possible pregnancy. If fertilization does not occur, the corpus luteum degenerates, leading to a drop in hormone levels and the initiation of menstruation.
Eliminate incorrect options: Fertilization does not occur in the uterus; it typically happens in the fallopian tube. Degeneration of the endometrial lining and initiation of menstruation occur later in the cycle if pregnancy does not happen.
Conclude that the correct event immediately following ovulation is the formation of the corpus luteum from the ruptured follicle, as this is the next physiological step in the reproductive cycle.