Hi Amina,
do you know what type of metal the clip contains? The only worrying thing is metal inside the body – i know they might have a coating, but this has a sedating effect on the energy in any case, and is not ideal.
for males the vasectomy, its a simpler process, and from what I can see, still would affect the energy, but i don’t know exactly how. As Daoists, who want to go with the flow of nature, this is not ideal anyway, and one should learn self control rather than go this far to alter the body.
even shaving your beard or cutting hair changes the bodys energy, so i am sure you can imagine internal changes like this can affect energy too.