But Cookies, all that is just speculation. That study had nothing to do with gender whatsoever, and was about an egg "weeding out" sperm from partners that may be perceived on some microscopic level as less desirable, not picking X or Y. X and Y sperm are all just one big megasperm XY cell, wearing the same skin, till very late in development, they may be identical on an external level, and we do not know that eggs have any way of differentiating the two of them.
Plus, it does not explain a)boy girl twins, b) how people doing IVF rounds can get both XX and XY, c) how Clomid, which is used the MONTH OF conception and not months in advance, may sway gender, d) how one attempt might therefore sway, because it sure seems to, e) how we can see things that men do, completely disparate and seemingly unrelated things like being a jet fighter, a deep sea diver, an anesthesiologist, jogging/biking, smoking, having certain illnesses and taking certain medications- that have nothing to do whatsoever with the egg's development because they're all things that MEN do, alters the gender ratio.
The reason why this matters, and why I don't like to see anyone getting too hung up on speculation, is because there are people who will skip perfectly good months because of things that are basically scientists musing out loud, not even hypotheses and certainly not even theories. There are people who will decide "I'll do LE Diet for 400 years before I get pregnant and get a guarantee, because eggs choose sperm, I read it on CNN." There are people who, if they go off diet ONE TIME will then skip months waiting for an ideal month, which puts them at risk of a binge-purge cycle alternating back and forth between starving themselves and gorging. There are people who will take herbs and medications, with unknown side effects for swaying and potential risks trying to emulate some "effect" which is entirely speculatory in nature (all the testosterone/progesterone crap falls under this umbrella). And, there are people who simply don't have 12 weeks to wait around and need to start trying sooner; I personally strongly believe that even a short time swaying is better than none at all, and focusing on theory that they can't adhere to, only discourages them.
There are a LOT of negatives here. All from speculation based on ONE study done in sixteen people who needed assisted reproductive technology to conceive, that wasn't even ABOUT GENDER AT ALL. There weren't even eggs involved, only sperm and follicular fluid. So I simply don't find it prudent to speculate about what we're doing here based on anything in that study, to any extent other than just a "hey, that's interesting" kind of way because it really doesn't apply to us. The truth is, we know next to nothing about how any of this works. Ladies, just keep doing what has worked for most people, most of the time, to such an extent as it works for you personally. If you can't do everything to the utmost extent, your sway is not doomed to fail based on this study or anything else.
I know you guys are probably puzzled as to why I am always so emphatically rejecting speculation in favor of "known unknowns" and all that, but it's because I have seen disaster ensue 123,456,789 times over these kinds of things. I have watched people pass up months that were perfectly fine only to end up trying in months that were much less fine. I have seen people who sink into morasses of despair over these types of speculatory notions being reported as fact in the media. I have seen people who don't even bother to sway, walking away from a better chance of having a baby of their desired gender, because they're so convinced by speculation (like, a person who just found out about swaying, has only two months to try, and no time to do a sway diet). I have seen the reverse happen, where people who are 43+ years old decide to do a sway diet or O+12 or whatever else for months before trying, when time was very much not on their side. And, I have seen people get consumed in a control freakish way, undoubtedly undermining their sways by far more than they could ever have helped it, by becoming obsessed with stuff that is nothing more than guessing.