Tilapia is raised with methyltestosterone, a sex hormone, and long-term eating of tilapia by women will cause masculinity. But now tilapia are all males, so basically we don't use methyltestosterone as a sex hormone to raise it ... It's harmless to human body ... Professional testing can be carried out with instruments in hospitals or chemical colleges ... Secondly, sperm density is very important. If it is in the water state, the survival rate is generally poor ... I hope I can help you. ...