Every month, the uterus prepares for the possibility of pregnancy, so if nothing happens, the uterus sheds the lining and passes out of the body.
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The uterus lining changes in thickness during the menstrual cycle in response to hormonal levels. In the first half of the cycle, estrogen causes the lining to thicken in preparation for a potential pregnancy. If fertilization does not occur, estrogen levels drop and the lining sheds during menstruation.
The increase in estrogen levels during days 1-10 of the menstrual cycle stimulates the growth and thickening of the uterine lining (endometrium). This thickening prepares the uterus for potential implantation of a fertilized egg.
Menstrual clots are thickened blood that can appear during menstruation, while menstrual tissue is the lining of the uterus that sheds during a period.
The lining of the uterus is shed during the menstrual phase of the menstrual cycle. This is when the body sheds the built-up uterine lining in the absence of a fertilized egg, resulting in menstrual bleeding.
The lining of the uterus shed during the menstrual cycle is called the endometrium. It is the innermost layer of the uterus that thickens in preparation for potential pregnancy and is shed if fertilization does not occur.
During the menstrual cycle, the uterus prepares for a possible pregnancy by building up its lining (endometrium). If fertilization does not occur, the uterus sheds this lining during menstruation. The hormones involved in the menstrual cycle regulate these changes in the uterus.