Drug companies have been working on a male pill or injection to inhibit sperm production and give couples a greater choice of family planning methods.

• 据路透社4月28日报道，世界众多制药公司一直致力于研发一种能够抑制精子生成的男性激素类避孕药片或注射针剂，希望这能给那些实施计划生育的家庭更大的选择空间。