There are a number of molecules that are still trying to be used as a birth control pill for men, In order to share the responsibility contraceptions between genders more equally. One of these approaches involves the molecule gossypol. In the 1970s China showed gossypol to be aeffective, but side affects were depleted levels of potassium which lead to heartbeat irregularity. Although recent tests in China and Brazil that using lower doses of Gossypol have shown that these side effects can be controlled.