Short answer
Couples should consider the purpose, temporary or permanent nature, medical safety, effectiveness, possible side effects and the relevant Islamic ruling.
Islamic Guidance
What Islam teaches
Islamic rulings can differ according to the method and circumstances. Temporary contraception and permanent sterilization should not automatically be treated as the same issue.
Practical Guidance
What you can consider
Discuss the decision together, obtain reliable medical information and consult a qualified Islamic scholar when a religious ruling is needed.
Sources
Qur'an 2:195; Sahih Muslim, Book of Marriage.