For gender selection to be possible, the majority of the sperms cells from your body must be XY chromosomes because there is tendency that, if it is a boy you need, the embryos prepared may be of girls. So my advise to any one going for gender selection, especially the men, should take medications to prepare their body for it for the procedure.
Fertility
Can Ovarian Reserve Be Restored at Age 40?
It is important to understand the biological changes that occur in female fertility, especially for women aged 40 and above
