- Menstrual Phase: The uterus sheds its lining, resulting in menstrual bleeding. This marks the start of the cycle and typically lasts 3–7 days.
- Follicular Phase: The pituitary gland releases FSH, stimulating ovarian follicles to mature. One follicle becomes dominant and produces estrogen, which thickens the uterine lining in preparation for a possible pregnancy.
- Ovulation Phase: A surge in LH triggers the release of a mature egg from the ovary, usually around day 14. The egg travels into the fallopian tube, where it can be fertilized for about 12–24 hours.
- Luteal Phase: After ovulation, the ruptured follicle becomes the corpus luteum, which secretes progesterone to maintain the uterine lining. If no fertilization occurs, hormone levels drop, triggering the next menstrual phase.
Parent Tip: Review the logic above to help your child master the concept of menstrual cycle worksheet.
