You keep saying that contraceptives are used to prevent ovulation. You said this in several places in your post. AN example is below:

One of the contraceptives that can be used to prevent ovulation is using condom contraception, intrauterine contraceptives, using pills, vasectomy and tubectomy and implant contraceptive medote.

Also, did you take the images/gif you used yourself? I am curious to know.

Aside from the issues pointed out, this is generally a good write-up about contraceptives.