Niagara Falls? Don’t Worry— YOUR Flow Can Be Explained Is it normal for flow to change color? Yes. The color can change from time to time. Menstrual blood that has passed to the outside shortly after leaving the uterus is brighter red than the blood that takes longer to reach the outside. Because of this, you shouldn’t worry if menstrual blood isn’t always bright red. How much blood will I lose during my period and how fast does it flow? The average is about two ounces, or four tablespoons. This could range from less than one ounce to a few ounces. Some girls think that the blood gushes out of them during menstruation. In reality, the rate is like a slowly dripping faucet, one drop at a time. Do heavy flow periods mean there’s something wrong? Not necessarily. Some women always have heavy periods—that's a normal period for them. Heavy periods could happen when an IUD is used, or if a woman stops using birth control pills. Heavy periods are also common the year or so after childbirth and in older women as they approach menopause. Why do some women have spotting between periods? Spotting refers to light bleeding for a day or two in the middle of the menstrual cycle. This is believed to happen because the woman has a temporary drop of estrogen that happens during ovulation. Mid-cycle spotting is normal. What are clots and why do women get them? Menstrual blood can "clot" in the uterus and these clots dissolve before passing to the vagina. But for some women, the clots pass through the cervical opening to the vagina without dissolving. If a tampon is worn, the clots will either adhere to or be absorbed by the tampon and removed when the tampon is withdrawn. Can fibroid tumors change the menstrual flow? It’s possible. Fibroid tumors could change either the duration or amount of menstrual flow. If that happens, be sure to choose the combination of absorbencies that’s right for you. Wondering if you have a normal period? Get helpful information and tips at BeingGirl.com.