Arrange the following events, write numbers 1-5. Then, write a s happens during menstrual cycle. 2 In follicular phase, the lining of the uterus starts to grow, or p estrogen. Menstrual cycle is a monthly series of hormonal changes lea and uterine preparation for a possible pregnancy. It has four In the first phase, menstrual blood is shed from the uterus th and out through the vaginal opening. When a mature egg (ovum) is released from your ovarian fo fallopian tube during your menstrual cycle, ovulation occurs the uterus. In this phase, the walls of the uterus thicken with many blo nutrients for the coming baby if in case a sperm fertilizes t fertilized, the thickening of the uterus breaks down and co the menstruation.