Get the Timing Right
Other medical experts also believe that Y sperm (boys) swim faster than X sperm (girls). However, girl sperm typically are more robust and live longer in the reproductive tract than the boy sperm.
So what does this theory mean to you? In a nutshell, if you’re hoping for a boy you should try to abstain from sex for several days before ovulation and then have intercourse as close to ovulation as possible. This increases the likelihood that the boy sperm (the faster swimmers) will beat out the girl sperm to the egg, and not have to survive too long while waiting around for the egg to show up. You’ll have to do some very careful calendar watching or take an ovulation test to determine precisely when you’re ovulating.
Boxers or Briefs?
Sperm are stored “outside” the body for a reason. They can’t tolerate excessive heat and the testicles’ independent structure and considerable surface area keep them safe from the elevated core temperatures inside the body. Some people claim that Y-chromosome sperm (boys) are even less tolerant of heat than X-chromosome sperm. So, if you’re trying for a boy, ask your mate to wear boxers for a while. This will keep things cool and give his “boys” some breathing room.
A cool bath or an ice pack to the scrotum would take matters further, but it’s probably a rare male who would be that keen on producing a son.
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