The reasons for not wanting a child after pregnancy can be seen clinically are very many, but mainly from the following two major aspects to consider: first, the patient can not want, can not want for the most common reasons are not married or have completed the requirements of childbirth, before pregnancy exposure to many rays, taking certain teratogenic drugs, have internal or other underlying diseases that affect the development of the embryo can not want, so do not intend to continue pregnancy. Secondly, the patient can have a baby but does not want it because of some special reasons, such as work, need to devote all their energy to work, need to be promoted; because the relationship between husband and wife is not good, do not want to continue to live with their husbands, so they do not want to have a baby, etc.