At the time of conception an egg is fertilized, thereby creating a unique new cell. The cell divides very quickly into many more cells and at about 1 week after conception this tiny mass of cells attach itself to the wall of the uterus (implantation).
At the time of conception an egg is fertilized, thereby creating a unique new cell. The cell divides very quickly into many more cells and at about 1 week after conception this tiny mass of cells attach itself to the wall of the uterus (implantation).