nocturnal emission

I have not had a nocturnal emission for over three years, and probably not more than twenty-five in my life.

These emissions are likely to occur once in two to four weeks and take the place of the nocturnal emission.

The nocturnal emission is not a universal method of emptying the seminal vesicles.

Is the emptying of the seminal vesicles thru nocturnal emission a universal phenomenon among continent men?

This phenomenon has been variously called nocturnal emission, "pollution" and "dreaming-off."