Whether ejaculated sperm like water affects pregnancy needs to be judged based on the test results and not on appearance. But in general, if the ejaculated sperm is lighter, pregnancy is less likely. The diagnosis can be confirmed by doing semen analysis. If the semen contains less sperm composition, less than 15 million sperm/mL, and at the same time it is less active, that is, less than 30% of active sperm, the possibility of making the other party pregnant is less. If it is seriously lower than this value, there is a possibility of azoospermia or oligospermia, and the possibility of making the other person pregnant is almost non-existent, which requires active search for the cause to be treated.