Does A Problem With Sperm Motility Favor A Girl or Boy Baby?

By: Sandy Dean:  If you are reading this article, you’re probably actively and efficiently trying to get pregnant.  If so, you may already know that that some components of the high quality sperm necessary to contribute to a pregnancy are sperm count and the motility of the sperm.  The count is how much sperm is present and the motility is how efficiently the sperm are able to pass the cervix, get into the fallopian tube, and eventually fertilize the egg.  People who suspect that their spouse has issues with sperm health or motility issues wonder if this will make them more likely to have a girl or boy.

Someone might ask: “I believe that my husband might have low sperm motility.  I notice that he has a high volume of sperm so I don’t think that a low sperm count is our problem.  But my ob/gyn said that although we haven’t been trying for that long, it could be that a sperm motility issue is at play.  I don’t know if this is true or not.  But if we do have a sperm motility issue, do we have a better chance of getting a boy or a girl?”

I am not a doctor or any type of specialist and this is definitely an issue for a specialist.  The only way to know if motility is truly an issue is to get it tested.  Ideally, it’s said that 50 percent of the sperm should make it to the egg in order to have motility that is at a good level for pregnancy. (A man who has less motility than this still has a chance of getting a woman pregnant, but it may take a bit longer or be more difficult.  And that is simply because not as many sperm are making it to the egg and so, the chances or pregnancy will be less.)

Honestly, even with perfect motility, men release about 50 percent of the female producing sperm (X) and 50 percent boy producing sperm (Y.)  Even if a man has a motility problem, the problem isn’t generally specific to one type of sperm.  So he would theoretically still be producing a 50 / 50 ratio.  What happens may be that the sperm are just not efficient at traveling to the egg and so they die off before they can make it.  Now, girl sperm live longer.  But, boy sperm arrive faster.  So this would seem to cancel out both advantages.

The only slight advantage that I could see would be that couples with a motility issue would be more likely to use deep penetration when having intercourse. They would do this because placing the sperm closer to the cervix would make travels easier for all sperm.  However, deep penetration gives the Y or boy sperm an extra boost since they don’t live as long and are faster.    Couples who were doing that anyway and who have unknown or undiagnosed motility problems MIGHT be slightly more likely to have a boy based on this.  But remember that timing and the vaginal PH are also important factors in baby gender also and we don’t know what these variables are.

If you have a motility issue, you’d want an alkaline PH which makes it easier for the sperm to survive and travel.  And you would want to have sex as close to ovulation as possible to maximize the vitality of the sperm.  All of these practices favor a boy baby.

But again, having a sperm motility problem in and of itself, does not, (at least in my non-professional opinion) favor one gender over another since nature has ensured that men produce equal numbers of X and Y sperm chromosomes.  However, some of the practices meant to boost motility can favor boy babies.

If you have any doubt about motility, consult a specialist.  If you are trying to get one gender over another, it is best to cover all possible variables.  These are timing, PH, and sexual positions.  I’ve put together a few websites that explain all of the variables step by step. If you want a boy baby, check out If you want a girl, see

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