What are the most common ethical implications of the use of contraceptions???

Answer 1

Ethics are not universal -- each group, association, profession or company can have its own separate code of ethics -- and many different codes of ethics can be contradictory to each other.

Within medical professions, ethical considerations would relate to accuracy of information, and having patients make an informed choice.

Without advocacy groups -- including religions advocacy -- the ethical issues would relate again to accuracy of information, but more with respect to making sure that people only say what the group wants them to say.

Then you have formal ethical schools -- like utilitarian ethics, which defines ethical based on what works -- under such a model, contraceptives would be unethical in a low population society where pregnancy was necessary for species survival -- but would be ethical in a high population density society, where pregnancy and reproductive rates need to be lowered.

Bottom line -- there is no one single answer -- it all depends on which set (or sets) of ethics you want to analyze, and within that the context.