Is there a trick to conceiving a girl?

Elokin • Ttc that precious little girl after having 2 teen sons
I posted here a week back about ttc. a girl, we have 2 teenage sons 18, 15 and always hoped for a girl, my hubby is also on board and are actively trying for the second month now, I am due to ovulate on the 19th according to my chart. Any tips? When should we have sex last to make sure only girl sperm survive? Anyone successfully conceived a girl with methods? Please help. Thank you!!