Do The X And Y Sperm Released By A Male Have Any Correlation On How Much Sex He Is Having? Are Men Who Have A Lot Of Sex More Likely To Have Sons?

I sometimes hear from people who are under the impression that the frequency of sex that a man has influences his baby’s gender.  For whatever reason, people sometimes are under the impression that the more sex a man has, the more likely he is to have sons. Someone will say something like: “my husband and I are young and have only been married for a short time.  So we have a lot of sex.  People tell us that because of this, we will have a boy.  I am thinking that I want a girl, so I am not sure where this leaves us.  Are you supposed to cut back when trying to conceive?  Do men who have more sex produce more Y sperm and therefore get boys?”

Studies have shown that most men have equal amounts of Y and X and sperm (both boy and girl-producing.)  This does not change regardless of how much sex they have.  Their bodies were given equal amounts and although these chromosomes may be released at various times and in various ways, the ratio doesn’t change.  I think that this perception must be a carry over from medieval or early times when it was very desirable to conceive a son in order to have an heir to inherit the family’s lands.  (Also, males could be useful in terms of providing labor to the family.)  Nobility and royals without males had no heirs and this would be a problem in those times.  So, people had large families because many children did not live to adulthood and families were looking for as many males as possible.  Therefore, the couple was having regular sex to try to conceive as much as possible so that they could have an ample number of children, preferably males.  I speculate that this is where the belief that lots of sex equals more males comes from.  Also, men and women who were able to produce males were seen as desirable.  In medieval times, a queen who could not give a king boys risked being set aside.  (Back then, they didn’t realize that it was the male chromosomes that influenced baby gender.)  Although people would often secretly wonder why Henry VIII of England could not produce male children, no one had the courage to question this.  The fault was always with the women.  However, it was still assumed that under normal circumstances, healthy and enthusiastic men who were enjoying sex with their wives should have been producing plenty of boys.

Whether we are talking about the past or the present, male boys are conceived when a Y sperm chromosome fertilizes the egg.  Since men has equal amounts of X and Y, this is why the sexes that are born are very roughly equal in number.  However, even though X and Y are present in similar numbers when you are trying to conceive, they react differently when deposited into the female.  Y sperm are faster, but less hardy, so they are quicker to die.  X sperm are slow, but live longer.  That is why couples that want girls will try to have sex before the woman’s ovulation and then stop.  They don’t want to deposit Y sperm close to ovulation day, because if they do, the Y’s speed will make a boy baby more likely.  If you want a girl and you want to focus on timing, then you’ll want to have sex before ovulation when you are trying to conceive and you are just before your fertility window.  (You can use saliva ovulation predictors for a month or two before to find out when this is – like these on Ebay.)  Now, when you are not trying to conceive or are well past your fertility window, then the timing of sex does not matter and you can have sex whenever you like without it affecting baby gender, since you only have to worry about it when you can become pregnant.

Also, vaginal PH and the sexual positions used can have an affect on X and Y.  But the frequency of sex doesn’t change the X and Y ratio.  In my opinion, you are better off combining timing with vaginal PH and positions in order to optimize all methods.  Having a lot of sex ensures that you are hitting your fertility window, but it is leaving baby gender up in the air.

If you’d like to explore PH and positioning further, I’ve put together a couple of websites that hopefully easily explains how timing, PH, and positions all work together.  If you’d like a girl baby, see If you want a boy baby, see