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Population explosions in developing nations have made male birth control research an imperative. A drawback to using testosterone as a male birth control method is limited delivery options. The progesterone-testosterone combination cannot be taken orally as digestion breaks down testosterone. The drug combination would have to given as a shot, patch, or an implant.

And a drawback to all hormonal methods of birth control is the inability to protect against sexually transmitted diseases. For the time being, condom manufacturers need not worry.