Final answer:
The positive reason to choose sterilization that does not fit is wanting children, but not right now. Sterilization is permanent, and thus not suitable for individuals who may want to conceive in the future. Alternative contraceptives or assisted reproductive technologies like IVF or PGD could be explored instead.
Step-by-step explanation:
All of the following are positive reasons to choose sterilization except wanting children, but not right now. Sterilization is a permanent method of birth control, often achieved via a vasectomy in males or tubal ligation in females, and is suited for individuals who are certain they do not want to raise a family. Opting for sterilization because one has a genetic disease or disorder, finding other contraceptive methods unusable, or not wanting to raise a family are considered valid reasons. However, if an individual wants children in the future, sterilization is not the appropriate choice due to its irreversible nature and the complexity and uncertainty surrounding reversal procedures.
For those who desire children at a later time, other contraceptive methods such as emergency contraception, which includes the "morning after" pill and IUDs, may be more suitable. Emergency contraception can be used after unprotected sex to prevent pregnancy. It is also important to note that procedures like in vitro fertilization (IVF) and prenatal genetic diagnosis (PGD) are available for those with concerns about genetic diseases, although they come with their own ethical considerations and financial implications.