But even healthy reproduction has a dark side. Neonaticide (killing infants that are less than one day old), infanticide (killing infants that are more than one day old), and the practice of disposing of female children in favor of male offspring are not only barbaric; they have led to imbalanced gender ratios in many emerging markets.
但即便健康生育也有阴暗面。当日杀婴（对象是出生不到一天的新生儿）、杀婴（对象是出生已满一天的新生儿）和抛弃女婴的重男轻女行为不但野蛮；还在许多新兴市场国家造成了性别比率失衡。