How to conceived baby boy

Based po sa experience at sabi nong kakilala ko na Doctor, on the day po sa ovulation yun yung day na may tendency to conceived a boy, but if before ovulation is meron tendency na girl, kasi girl chromosomes can live longer mga 3-5 days, yung boy po is 24hrs lang mamatay na, kaya best daw if on the day. But take note tendencies lang po yun, wala po talagang right position or days, but because of scientific explanation about how many days the boy/girl choromosome lives kaya po ganun.