7

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Diet, pregnancy and offspring sex determination.

Answered on August 19, 2014
Created October 19, 2011 at 6:25 PM

Now if you didn't know this, it seems that diet, stress, infection etc. may determine the sex of the offspring.

Recent study linked human mother stress to female offsprings. Before that we had mices http://www.biolreprod.org/content/71/4/1063.full

This is interesting:

In particular, a diet high in saturated fats but low in carbohydrate leads to the birth of significantly more male than female offspring in mature laboratory mice, whereas when calories are supplied mainly in the form of carbohydrate rather than fat, daughters predominate.

Can we have some mom input here ? What did you eat, what was your level of stress, did you have any chronic infections at the time of pregnancy and what was the sex of the output ? :)

6229cd9a7ca9882590259fae022e2647

(3209)

on October 31, 2011
at 08:52 PM

I was also eating low carb when I got preggo with my boys.

Ed983a42344945b1ff70fd9597a23493

on October 20, 2011
at 04:03 PM

It would be cool to see how this played out in a study that would span several generations...

77877f762c40637911396daa19b53094

(78467)

on October 20, 2011
at 07:52 AM

Ofc, its not a rule, just probability. Thx

77877f762c40637911396daa19b53094

(78467)

on October 20, 2011
at 07:52 AM

So, both you and Meredith were VLC with boys...

77877f762c40637911396daa19b53094

(78467)

on October 20, 2011
at 07:51 AM

Interesting. Thx.

6498694060d879a7960b35913539b75f

(1307)

on October 19, 2011
at 09:43 PM

@Meredith, your diet and stress levels while pregnant will not affect the gender of your baby. The gender has already been determined at that point, and won't change no matter what you eat! FWIW, we did IVF with PGD testing and got almost exactly the same number of male embryos as female. I follow a high-fat, low carb primal diet and am currently pregnant with a girl. :-)

0dbd7154d909b97fe774d1655754f195

(16131)

on October 19, 2011
at 07:37 PM

@dragonfly - that's what my midwife always told me, that insemination closer to ovulation had a better chance of producing a boy (since the male sperm are faster and die sooner) and sex a few days earlier had a better change of "outputting" a girl (since those long lived sperm would still be around at the time of ovulation). That being said, I ate a pretty low carb high fat diet while prego - had a bit of stress each time and the output was 2 males.

Ce41c230e8c2a4295db31aec3ef4b2ab

(32564)

on October 19, 2011
at 07:32 PM

One possibility is that diet, stress & infection will all impact on the pH of the vaginal & cervical fluids which will influence which type of sperm will be more likely to survive & get up to the fallopian tubes. My recollection is that XY sperm are faster, but more delicate and prefer a different pH to the more robust XX sperm.

Ce41c230e8c2a4295db31aec3ef4b2ab

(32564)

on October 19, 2011
at 07:29 PM

On possibility is that diet, stress & infection will all impact on the pH of the vaginal & cervical fluids which will influence which type of sperm will be more likely to survive & get up to the fallopian tubes. My recollection is that XY sperm are faster, but more delicate and prefer a different pH to the more robust XX sperm.

215d3126214343a5760316f195a06b97

on October 19, 2011
at 07:10 PM

That's weird considering the male's sperm determines gender. I suppose maybe stress changes the chemical balance in a woman's vagina that either attracts or kills off one sex over the other. I don't know, I'll have to read this study. From my experience I haven't found a connection- my two most stressful pregnancies were one boy and one girl.. I also have 3 other girls and 1 other boy- not much stress associated w/ them.

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5 Answers

5
D3ff004d4a0c42b67cc2c49a5ee9c0f3

(5801)

on October 19, 2011
at 10:23 PM

I don't buy it with humans. In the USA at birth 1.07 boys born per girl. Strangely enough, worldwide, the birth sex ratio is 1.07 boys per girl.

That would suggest that on average, everyone's life is just as stressful and everyone has on average the same diet as in the USA.

https://www.cia.gov/library/publications/the-world-factbook/geos/xx.html https://www.cia.gov/library/publications/the-world-factbook/geos/us.html

1
32f5749fa6cf7adbeb0b0b031ba82b46

(41747)

on October 19, 2011
at 10:10 PM

In livestock many folks swear that adding apple cider vinegar to animals' drinking water will alter the sex of the offspring. Their theory is that the acidic vinegar acidifies the reproductive tract and that Y sperm aren't acid-tolerant, while X sperm is. It's an old-wife's tale though. But something a bit more complex than pH seems possible.

77877f762c40637911396daa19b53094

(78467)

on October 20, 2011
at 07:51 AM

Interesting. Thx.

0
Ed983a42344945b1ff70fd9597a23493

on October 19, 2011
at 10:46 PM

Here's some Mama input...during my first pregnancy, I was a strict vegan, and while I had a pretty mellow lifestyle, I moved houses while pretty far along, and got married, plus I was working several jobs, all with young children...so, yeah, there was some stress there. I gave birth to a girl. During my second pregnancy, I had been eating a WAPF based diet for over a year, and I'd been eating low carb for several months when I conceived, and had no major life events. I gave birth to a boy. So my experience fits into the theory, but I have vegetarian friends who eat heavy carb based diets and have tons of stress who have given birth to several boys. I've always thought that some men just tend to have more of one gender, and that you can guess at their predisposition by looking at what gender the father of the man in question tended to have more of...of course that information only works in larger families. My father fathered five children, four of us are female. The only male thus far has fathered one daughter...it's all so interesting...

77877f762c40637911396daa19b53094

(78467)

on October 20, 2011
at 07:52 AM

Ofc, its not a rule, just probability. Thx

Ed983a42344945b1ff70fd9597a23493

on October 20, 2011
at 04:03 PM

It would be cool to see how this played out in a study that would span several generations...

0
6120c989fd5b69f42a0834b69b87955b

(24553)

on October 19, 2011
at 10:21 PM

Don't know if there's anything to this, but my experience does support the idea posed, I was VLC for the months leading up to conceiving a boy. Being roughly 50/50 odds, that isn't exactly landslide proof in my mind though.

If you wanted to "sell" LC paleo to societies that prefer male offspring, this would be a good angle to work.

77877f762c40637911396daa19b53094

(78467)

on October 20, 2011
at 07:52 AM

So, both you and Meredith were VLC with boys...

6229cd9a7ca9882590259fae022e2647

(3209)

on October 31, 2011
at 08:52 PM

I was also eating low carb when I got preggo with my boys.

-1
26b7615ef542394102785a67a2786867

on October 19, 2011
at 09:58 PM

I think that it's more complicated than 'whatever sperm gets there first'. If you've ever seen videos of the moment of fertilization, there are usually multiple sperm present at the same time; the egg accepts only one. As far as I've read no one knows what influences this 'choice'.

The woman's body/egg cell having some say is the only explanation for crazy cases like my fiance's uncle, who had 7 boys with his first wife and 6 girls with his second wife.

There hasn't been a boy born in my family for 35 years. We're all carb lovers... we'll see what happens when my saturated-fat-loving self tries to get pregnant.

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