Any medical issues against artificial contraceptives?

The World Health Organization has classified oral contraceptives as an A-1 level carcinogen, which puts it on the cancer-causing level as asbestos and cigarettes.

http://www.cancer.org/Cancer/CancerC...an-carcinogens

The lists themselves say nothing about how likely it is that an agent will cause cancer. Carcinogens do not cause cancer at all times, under all circumstances. Some may only be carcinogenic if a person is exposed in a certain way (for example, swallowing it as opposed to touching it). Some may only cause cancer in people who have a certain genetic makeup. Some of these agents may lead to cancer after only a very small exposure, while others might require intense exposure over many years. Again, you should refer to the agencies' reports for specifics.

Even if a substance or exposure is known or suspected to cause cancer, this does not necessarily mean that it can or should be avoided at all costs. For example, exposure to ionizing radiation is known to cause cancer, with increased risks even at low levels of exposure. Yet there is no way to completely prevent exposure to natural sources of radiation such as cosmic radiation from the sun or radon in soil. These lists also include many commonly used medicines, particularly some hormones and drugs used to treat cancer. For example, tamoxifen increases the risk of certain kinds of uterine cancer but can be very useful in treating some breast cancers, which may be more important for some women. If you have questions about a medicine that appears on one of these lists, be sure to ask your doctor.

Looking at the list below can tell you whether or not something may increase your risk of cancer, but it is important to try to get an idea of how much it might increase your risk. It is also important to know what your risk is to begin with. Many factors can enter into this, including your age, gender, family history, and lifestyle factors (tobacco and alcohol use, weight, diet, physical activity level, etc.). As noted above, the type and extent of exposure to a substance may also play a role. You should consider the actual amount of increased risk when deciding if you should limit or avoid an exposure.

Checkbox, specifically which type of contraceptive are you inquiring about? The number of types (various pill formulations, injections, implants, patches, IUD's, condoms, spermacides...) covers an area too broad to discuss with any meaning.

Why don't you make an effort to look up the specific type you are confused about, then if you still do not understand what the side effects are, you can ask for clarification on that specific brand of contraceptive.

There are literally thousands of papers that have been published on the subject of the combined pill alone (roughly 1/10 are free if you don't have access to journals). For an introduction and further links why don't you read through the wiki page.

Whilst there are risks associated with the pill literally millions of women use it worldwide and have done for over 50 years. If there were any drastic long-term medical effects (akin to smoking for example) they would have been apparent.

I think Wiki page is useful as a starting point for orientation on a subject, but not really considered a source to be cited in a research paper.

Also, I came accross a couple of links and it says otherwise.

The oral contraceptives e.g. pills.

Are you writing a research paper?

Yes, I am.

Yes, I am.