Fertilized eggs are generally not absorbed. The sperm and egg combine to form a fertilized egg, which, if it beds in the uterine cavity, will gradually differentiate and develop into a fetus that will not be absorbed by the body. If, after bedding, the embryo’s development stops because of a poorly-qualified fertilized egg, exposure to harmful substances, etc., there will be a miscarriage, in which the embryonic tissues will be bled out. If the fertilized egg doesn’t settle in the uterine cavity, it will also flow out and a biochemical pregnancy will occur. A fertilized egg cannot be absorbed after it is formed, and biochemical pregnancies can usually flow out on their own. If the fertilized egg is deposited in the uterine cavity and then the pregnant woman does not want to continue the pregnancy, the body will not absorb it on its own, and the pregnancy will need to be terminated by abortion. So if a woman doesn’t want to get pregnant she needs to use contraception.