The blood mother is a woman’s uterus, the place where menstrual blood originates. The blood mother is the name in Chinese medicine, and is usually usually referred to as the uterus. Generally, after a woman gives birth, especially after the delivery of the second child, most of them will experience painful uterine contractions, that is, the woman’s uterus rhythmic contractions, the remaining blood in the uterine cavity will be excreted, in addition, due to the uterine muscle rhythmic contractions, will make the uterus gradually shrink, which will be conducive to the recovery of the uterus and reduce the uterine bleeding, the mother of the blood is the place of conception of the fetus.