For anyone who is interested, our first sway attempt resulted in a BFN, so now I don't have to stress about how I ruined the timing part of my sway. Instead, now I can start stressing about how maybe I'm too old, my eggs are all rotten, and I'm not going to be able to get pregnant. (There's always got to be something to stress about, you know! 
) Anyway, since we are still not pregnant, I am still obsessed with analyzing charts, and so today's post deals with another theory I have run across for swaying.
One of the theories I've wondered about is whether BD every other day results in more boys, since gaps of 48 hours or more are supposed to favor boy sperm. So I looked through the 700 charts I have amassed to see how BD every other day sways. In order to have BD every other day, you can only BD 2, 3 or 4 times during the 5 days prior to through the day after ovulation. There were 40 boy charts and 42 girl charts with every other day BD, resulting in a preference for girls of 51.2%.
- 2 times: 23 boy charts, 23 girl charts (50/50)
- 3 times: 16 boy charts, 14 girl charts (sways boy 53.3%)
- 4 times: 1 boy chart, 5 girl charts (sways girl 83.3%)
As you can see, the results were pretty similar except for BD every other day for 4 days. That pattern significantly favored girls (though since there are only 6 charts, the percentage isn't particularly reliable). Part of the reason for this is that there is only one BD pattern possible if you are BD every other day, for 4 times, within the 5 days prior to through the day after ovulation: O-5, O-3, O-1, and O+1. This pattern also counts as frequent BD that avoids ovulation, which as has already been discussed, significantly favors girls. Apparently if you are swaying for a girl, the benefits of frequent BD that avoids ovulation outweighs the risks of BD every other day.
If we omit BD every other day for 4 times, the results are essentially the same as chance (39 boy charts out of 76, sways boy 51.3%). I would still be leery of BD every 48 hours if you are swaying for a girl because of other evidence that BD every 48+ hours favors boys. However, the above information suggests that BD every other day may be another timing pattern that does NOT sway, and so it won't hurt or help your efforts for whatever gender you are hoping for.
There were some aspects of BD every other day that did appear to have an influence on gender. 25 of the charts had BD on the day ovulation: 15 boy charts and 10 girl charts, which results in a preference for boys of 60%. And 11 of the charts had a cut-off of at least 2 days: 4 boy charts, and 7 girl charts, which results in a preference for girls of 63.6%. This suggests that while BD every other day seems to be pretty close to 50/50, it does favor boys if it includes BD on ovulation and it favors girls if the every other day BD has a 2-3 day cut-off.