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What does implantation bleeding look like?
asked Dec 15, 2010 by triuser (1,746 points)

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There is often the feeling that it is a period with light cramps and bloating, but the bleeding is shorter, lighter and simply not normal. If a woman is usually regular, and now all of a sudden develops this type of early spotting, and of course is at risk for a pregnancy, conception is recommended. Trophoblast is a highly specialized tissue, which develops from the fertilized egg and surrounds the egg. It attaches the egg to the endometrium and as it is continuously growing it invades the endometrium, so as it eats its way into the endometrium it pulls the egg into the endometrium. The trophoblast also invades the mothers blood vessels and divert her blood to cavities inside the trophoblast. These cavities are than filled by maternal blood becoming blood lakes, and most of these lakes are connected. The trophoblast on the outer surface of the egg are thinner and slower growing but also contains cavities that are connected to other deeper cavities. Some of these outer cavities communicate or open into uterine cavity. Blood that leaks from these cavities are causing implantation bleeding, and it occurs shortly before the egg is completely implanted and completely covered with endometrium. Typical implantation bleeding occurs about four weeks after the last menstrual period, it is usually less and darker than the person’s normal menstruation. The diagnosis of typical implantation bleeding is made in retrospect and duration of the pregnancy is four weeks more than expect
answered Jan 1, 2011 by trianswer (22,754 points)

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