I only have 2 boys but yes, I did sway with my daughter. I researched a lot, mainly on here and there was a very helpful lady on FF too who offered a lot of good advice.It was very confusing so in the end I picked what made sense and was practical for me.
I naturally have a boy rich diet, I cut out as much sodium as possible and looked for alternative foods which seemed more suitable (mozarella cheese instead of normal cheese, wraps and pitta bread rather than normal bread) but I've seen MUCH better sway diets than mine on here. I also did the vitamins, replens, made DH wear tight pants and had him masturbate frequently (lol, he's laid beside me now reading, if he looks over now and sees what I'm typing he'd so freak!). I also took sudafed a couple of hours before sex and BD as much as possible. I don't buy into the whole shettles thing, seems very hit and miss to me and my O date changes slightly each month. I read that freqent sex lowers sperm count and at the end of the day it's the mix of his sperm which will make the ultimate difference. Which is the same reason I had him drink lots and lots of alchol, I'd also read alcohol lowers sperm count and alcholics are more likely to have girls, true or not it was no sacrifice for DH and I thought 'why not?'. So, not a conventional sway, and whether we would have still had DD or not I don't know. But I tried it and if I hadn't and had another boy I would have always thought 'what if....'