It all starts with the Pituitary glands, they secrete a hormone that flows through the blood stream and reaches the ovaries, creating a follicular cyst, surrounded by eggs and secreting hormones. Then the pituitary gland secretes another hormone called the LH(Luteal Hormone). There is a peak of the hormone level that will release the egg. The egg is then sucked in by the fallopian outer edge. It takes 5-6 days for the egg to travel to get to the uterus. Back to the over, after the follicle has ruptured out of it, it is converted into this yellowish body called the corpus luteum. Cells of the corpus luteum secrete the hormone called progesterone, which bring about important changes to the lining of the endometrium making it suitable for fertilized egg. If there is no fertilized egg then the endometrium lining will shed causing the menstrual bleeding.
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