As implantation (nidation) is the process in which a fertilized egg in the uterine lining constructed sets. With the implantation of the actual pregnancy, which can now also be determined hormonally begins - first by blood test shortly afterwards by urine test.
Once a month, an egg gets in a woman of reproductive age on their way to the uterus. One of the two ovaries it travels to the fallopian tubes. She meets here on sperm can fertilization occur. Seldom, the egg is fertilized only in the uterus.
The fertilized egg (seedling) Is now actively transported through the fallopian tube to the uterus, by encouraging small cilia in the fallopian tube with wavy movements. In the womb, the embryo can then settle.
Still on the way to the implantation of the new cell begins to divide, the newly formed Cells divide again and so it goes on. In their cores all cells contain completely identical genetic material (stem Cells).
About on the 4th day after fertilization is the seedling from 32 to 64 cells and is blastocyst called. The cells begin to specialize. At that time, the blastocyst reaches its destination: the uterus. Here they penetrate the lining of the uterus and is already a few days later embedded completely in this.
The process of adhering to full integration into the lining is called implantation.
first hormonal signals in the blood of pregnant women can be measured from the time of implantation to. A urine test is unique only to the absence of periods around. The actual pregnancy has begun, You are now in the fourth week of pregnancy (SSW). Of all that has happened so far, you usually have noticed little or nothing as expectant mother, for you are now only about 22 to 23 days in your cycle, and it will take another five to six days until the notice a missed menstrual period bleeding.
When exactly is the implantation?
The fertilized egg implants itself Before you expect your next period about a week, in a uterus. You can determine that time relatively accurate, if you know your cycle length and the dates of your ovulation.
Some women notice at the time of implantation also slight bleeding, called Einnistungsblutung. A Einnistungsblutung or Nidationsblutung can occur when microscopic vessels are injured when the egg cell pierces into the Gebährmutterschleimhaut.