Menstruation phase: starts on the first day and ends on the fifth , on average 10-80mL of blood is shed during this phase, The uterus sheds its inner lining of soft tissues and blood vessels, which exit the body from the vagina in the form of menstrual fluid., Follicular phase: Starts on the first day of menstruation and lasts until the 13th day of the menstrual cycle., The pituitary gland produces and discharges a hormone that stimulates the egg cells in the ovaries to grow., One of these egg cells begins to mature in a sac-like structure called follicle., Ovulation phase: Occurs roughly at mid-cycle, around two weeks before the onset of menstruation., The egg (which has a lifespan of a day) is funneled into the Fallopian tube and towards the uterus., Luteal phase: Begins on the 15th day and lasts till the end of the cycle., The egg cell released during the ovulation phase stays in the fallopian tube for 24 hours., Progesterone levels increase during this phase, which helps thicken the lining of the uterus.,

menstrual cycle

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