Menstrual Cycle Basics: Easy-to-Follow Animation

The follicular phase is a crucial part of the menstrual cycle that prepares the body for potential pregnancy.The phase begins with menstruation, where the uterine lining sheds.Follicle-stimulating hormone, or FSH, is released, triggering the development of multiple follicles in the ovaries.While multiple follicles begin to develop, one becomes dominant and continues to grow.The dominant follicle produces increasing amounts of estrogen, which stimulates the rebuilding of the uterine lining.Over the next fourteen days, the uterine lining gradually thickens in preparation for potential pregnancy.As the follicular phase progresses, hormone levels continue to change, preparing for the next crucial phase of the cycle.Around day 14 of the menstrual cycle, a dramatic surge in luteinizing hormone, or LH, occurs.This LH surge triggers the final maturation and release of the egg from the dominant follicle, a process called ovulation.The mature egg bursts from the follicle and begins its journey through the fallopian tube.During ovulation, the body undergoes several noticeable changes. One key indicator is a slight rise in body temperature.Cervical mucus also changes, becoming clearer and more stretchy, similar to egg whites, which helps sperm travel to the egg.Once released, the egg can be fertilized by sperm within a 24-hour window. This represents the peak fertile period of the menstrual cycle.After ovulation, the empty follicle undergoes a remarkable transformation.The empty follicle transforms into a structure called the corpus luteum, which appears yellow due to increased blood flow and hormone production.The corpus luteum begins producing progesterone, a crucial hormone that maintains and thickens the uterine lining.Under the influence of progesterone, the uterine lining reaches its maximum thickness, preparing for potential implantation.If fertilization doesn't occur, around day 24 of the cycle, the corpus luteum begins to degenerate.As the corpus luteum degenerates, progesterone levels drop dramatically, triggering changes in the uterine lining.Let's review the key points about the luteal phase of the menstrual cycle.The corpus luteum produces progesterone to maintain the thickened uterine lining. This phase lasts about fourteen days and ends with menstruation if pregnancy doesn't occur.This completes our exploration of the menstrual cycle. Thanks for learning with Spark.E!