There is no proven way to reliably increase Y sperm count to guarantee a baby boy
Have intercourse as close as possible to ovulation
Track ovulation accurately using ovulation predictor kits
Maintain a healthy weight
Eat a balanced diet rich in fruits, vegetables, whole grains, lean protein, and healthy fats
Avoid smoking
Limit alcohol intake
Avoid recreational drugs
Reduce exposure to heat on the testes
Avoid tight underwear and prolonged hot baths or saunas
Manage stress
Get regular exercise
Sleep enough each night
Treat any fertility issues with a doctor
Review medications with a healthcare professional
Consider genetic counseling or fertility specialist consultation for sex selection options where legal and appropriate