Previous studies have shown that many places which long winter like Canada and North America men do not adsorb Vitamin D and others nutrients.

In Canada men do not adsorb vitamin D in consequence one of seven can develop prostate cancer in their lives; USA new researches indicate that one of five men can develop prostate cancer.

Researchers shown that vitamin D has many micronutrients promote and prevent prostate cancer in men.

Effectiveness and other advantages Because of their main action on hormonal changes these pills are much more effective, some studies lay figures of 10 times, than traditional methods. There is also more patient compliance as they are not to be used only at time of sexual intercourse. Moreover they can be used in crowded home situations.

Side effects They may cause certain side effects such as nausea, weight changes, breakthrough bleeding, blood glucose disturbance, mood swings, hypertension, clot formation in leg and lung veins and some genital carcinomas but incidence is very less. So a specialist should thoroughly examine case before being prescribed.

Contraindications They should not be prescribed in subjects having some liver disease, suspected certain gynecological cancers, clotting disease, etc.

Male birth control pills There are also certain male birth control pills available in market such as gossypol as well as in research stage but both because of patient non-compliance and because of their less effectiveness and various side effects, they are not as popular as female birth control pills.