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What is in period blood?

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Yes, it is REALLY blood! During the second half of your cycle, the lining of your uterus (endometrium) begins to thicken in preparation for a fertilized egg. By then end of the cycle, if this does not happen, the hormones progesterone and estrogen begin to fall and that thickened endometrium begins to slough off. read more

Menstruation, also known as a period or monthly, is the regular discharge of blood and mucosal tissue (known as menses) from the inner lining of the uterus through the vagina. The first period usually begins between twelve and fifteen years of age, a point in time known as menarche. read more

During your period, your body produces chemicals called prostaglandins that encourage the uterus to contract and push out what's inside. But strong contractions can briefly pinch off blood supply to the area, setting off waves of pain. It's not fun, but it's normal. read more

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