Several times lol!
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Several times lol!
Ok, the FGD is based on some super old studies done back in the 30's on this species of marine worms whose sex is not even determined by genetics, but by their environment. They HAVE no sex when they're first born and then they all turn into girls unless there's another girl around at which point one of them turns into a boy. http://en.wikipedia.org/wiki/Bonellia_viridis http://www.sciencedirect.com/science...22098183900254 http://www.informaworld.com/smpp/con...ent=a922379078 If you shoot some minerals into their tanks it makes them turn different genders. It makes NO earthly sense at all to extrapolate that to mammals, let alone humans. A couple other researchers did similar tests in a couple different species of worms, one of which is also hermaphroditic like the Bonellia is, and one that has boy and girl EGGS, not boy and girl spermhttp://www.springerlink.com/content/mh3b4152940u13m8/. One other study was done in amphibians but environmental factors have been proven to affect gender ratio in amphibians and reptiles but not in humans. http://www.sciencedirect.com/science...16699589800312 refutes the idea that environment can be extrapolated to humans. It means nothing. NONE of these animals even have the situation where there are male and female sperm determining gender like humans do.
Then some other guy came along (Stolkowski) and decided to study this in other animals (even though, I must point out, he must have had very little understanding of even the most basic biology). The FGD book tries to make it out like there was a study done on the Vit. D, but I have a different book written by someone who actually read Stolkowski's writing, that says they took the records from dairies in the area, and that makes more sense given the wording of the FGD book as well - it says point blank that the info about the births was "obtained". Out of a pool of 968 cows, only 77 cows were even treated with Vitamin D...so if this was some big study, wouldn't they have injected enough of the cows to get a decent size sample? It is pretty obvious that they were collecting the data after the fact to support their hypothesis. 77 is not a large enough sample size to determine anything, and even of these 77 cows, only 49 of them had females anyway and in the untreated cows the gender ratio was 57% boys and 43% girls which is pretty darn close to what the gender ratio is anyway. Vit. D is in no way a magic bullet for pink, among cows or anyone. He does have various studies, some of which are intriguing but I have seen newer studies that debunk them.
The Oxford study I happen to think is one of the most useful studies for swaying, because the researchers weren't even LOOKING for anything having to do with gender ratio, they were studying something else entirely, so there was no outright or subtle instructions given to the mothers that they HAD to follow a particular diet and no reason to lie about what they ate or didn't eat, they simply recorded what they ate. And it was done on 750 people, not on one or two hundred like the FGD studies were. The Oxford study found higher levels of nutrient intake across the boards among moms of boys. ALL nutrients, including calcium. Now it could very well be the case, as one of the authors speculates, that it's at least in part because moms who had boys ate more calories so of course their nutrient intake was greater, but it does seem to indicate that you can eat calcium as a large part of your diet and STILL have more boys (which was my personal experience as well.)
Now the Dutch study has claimed to support the FGD findings but I know for a fact that the Dutch are selling their product to people so I take that with a HUGE grain of salt. I'm not saying they would lie or misrepresent their data but I can def. see how the subjects of the experiment might fudge what they were actually eating so the researchers wouldn't get "mad". They also claim to have blood tests but ANYONE taking calcium supps is going to have higher calcium levels in their blood than someone who doesn't.
All this is kinda academic I know, and I DO think the FGD sways, but it's because the boy diet has more meat and calories and the girl diet is limited in nutrients and lower cal.
I want to see a study done where two groups of people (but I will settle for spider monkeys LOL) eat the exact same diet, same protein, same carbs, same fat, and one group gets cal/mag supps and the other group gets sod/pot supps and if THAT study demonstrates an altered gender ratio than I will start singing a different tune.
Wow, you really know your stuff! Thanks so much for taking the time to write it all out.
So, would you personally take a calcium/mag supplement if you were swaying pink? Do you feel it's something which isn't necessary but doesn't do any harm either or do you think it's something which might have a negative effect? Right now I'm wondering about dropping them. I realise that literally everybody swaying for a girl takes them but I am doubtful having read your posts and I've seen enough girl sways which have failed despite mum taking large amounts of calcium/mag that I don't feel I would ever think it would have worked if only I'd taken them. I am eating calcium rich foods as part of my low-everything diet - a little skimmed milk, yogurt and cheese each day.
Sorry - this post was originally about vitamin D and I've gone off on one about calcium and magnesium!
I'm very sceptical about ions, it's just not something which fits with the way my brain works iykwim. The only things I thought I would do (because they're easy!) are lavender and painting my nails - but now I've read that those things lower testosterone but also increase estrogen so they're only good for the man and not the woman anyway!
So they say! I worked outside for 5 hours a day when I conceived DS 3 though and it seems pretty dang unlikely when humans either wandered the savannah for a million years or the desert for 40, that just the act of being outside would alter the gender ratio in any way.
Now day length and changing levels of Vit. D on the other hand...that's a different story. ;)
Interesting... When I was still nursing DS2 I had a blood test to check my vitamin levels. My D was OFF THE CHARTS. apparently, my body metabolizes D poorly and there was a lot in my prenatal and other supplements. I dropped them and the numbers fell. I have two boys. I was always a vitamin girl until these tests.
since this is an old thread let me just update, jjc, Zanacal and I did all go on to get baby girls without cal-mag and Vit. D. :)