What sex selection method can be used to have a male child instead of pgd or precisely i need a male child because i already have four female children?

Same as for females: Short of having specific embryo transfer, there is no ritual or timing program that produces predictable results in gender selection. Your chances are always the same. Retrieving eggs, fertilization in the lab and embryo selection at a fertility center is possible but difficult. Artificial implantation does not guarantee successful pregnancy.