Is the discharge from a newborn's private parts—such as urine—considered impure, and how can one guard against it or purify it when its droplets spread onto carpets or clothes?

The urine of a female infant must be washed, while that of a male infant can be sprinkled. One can guard against the urine of a female infant by dressing her in diapers. The basic principle regarding things is purity, and certainty is not removed by doubt.